An air horn is a pneumatic device designed to create an extremely loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm.
The stream of air causes the reed or diaphragm to vibrate, creating sound waves, and the horn amplifies the sound so it is louder.
Air horns are widely employed as vehicle horns, installed on large semi-trailer trucks, fire trucks, trains, and some ambulances as a warning device, and on ships as a signaling device.

An air horn consists of a flaring metal or plastic horn or trumpet (called the "bell") attached to a small air chamber containing a metal reed or diaphragm in the throat of the horn. Compressed air flows from an inlet line through a narrow opening past the reed or diaphragm, causing it to vibrate, which creates sound waves.
The flaring horn serves as an acoustic "transformer" to improve the transfer of sound energy from the diaphragm to the open air, making the sound louder.
In most horns it also determines the pitch of the sound. When vibrated by the diaphragm, the column of air in the horn vibrates in standing waves.
The length of the horn determines the wavelength of the sound waves generated, and thus the fundamental frequency (pitch) of the note produced by the horn. The longer the horn, the lower the pitch.

Larger air horns used on ships and foghorns function similarly to a whistle; instead of a diaphragm the air escapes from a closed cylindrical resonator chamber through a precisely shaped slit directed against a knife edge (fipple).
The air blowing past the knife edge oscillates, creating sound waves.
The oscillations excite standing waves in the resonator chamber, so the length of the chamber determines the pitch of the note produced.

Total Length: 9.50" Weight: 1.43 lbs Blade Color: Rainbow Blade Finish Tinite Coated Blade Materia:l 3Cr13 Handle Material: Stainless Steel Sheath Material :Nylon Sheath Type: Throwers Style: Throwing Blades Theme: Target Sports includes Sheath

MTech mt-a1174pl usa spring assisted knife is 6.9 inches long open length. the knife blade is an overall 2.9-inch in length, 3cr13 polished blade.4-inch polished tinite coated stainless steel handle. pocket knife spring-assisted knife 6.9-inch overall open length 2.9-inch 3cr13 steel polished blade 4-inch polished tinite coated stainless steel handle includes pocket clip

DESCRIPTION OF GANZO TOUCH PRO STEEL (GTPS) KNIFE SHARPENER:
The company has developed another Ganzo universal grinder, called Touch Steel. Its main characteristics being a metal structure, so there a no concerns about the strength and durability of the tool. Optionally, the user can fasten the base of the grinder to a table top or other surface and for this purpose there are special for bolts. It is of course, quite possible just to hold the tool so that it doesn’t move while sharpening a knife.
It is also important to note that the grinder Ganzo Touch Pro Steel is more compact than previous models; therefore, it is easier to transport. The grinding guide consists of two separate parts. The handle on this model is oblong with a rubber coating. Touch Pro Steel will appeal to both home workers who do not have experience in self-sharpening of knives and also professional users. The grinder provides the user with some flexibility with the whole sharpening process, by selection of the most appropriate parameter settings. The knife can be firmly fixed using a clamping plate, and in this position the use can be assured that no hands will be injured during sharpening. The blade will always be set at the correct angle of inclination.
Sharpening angle is set individually depending on the type of sharpened tool.
The grinding tool kit includes four grinding stones grinding stones ate different levels of granulation. The mechanism of grinding stone replacement in the Ganzo Touch Pro Steel, allows for easy and quick setting, done in seconds! With the grinder Ganzo Touch Pro Steel in base kit form, high quality sharpening of heavy blunt knives can be done with confidence.
Feature:
Metal structure throughout;
Sharpening angle is freely adjustable;
Rigid fixation of the blade is possible;
The grinder can be fastened to any smooth surface;
Sharpening function knives of any purpose, scissors, construction and garden tools;
Fast change of grinding stone is possible.
The warranty period is 1 year from the date sale of the item.
Type
stationary
Warranty
1 year

SUUNTO A-30
SH Metric Compass
A compact, accurate compass for hiking and orienteering, also in poor visibility.

The Baseplate Compass for Dark Conditions
The adventure compass. A reliable compass is essential for navigating and surviving in extreme conditions. These hardy baseplate compasses are ready for the challenge.

Product Highlights:

• Operable in low light with luminescent markings
• Magnifying lense on transparent baseplate for easy use with map

This spring assisted knife has 4.4 overall length with black blade and anodized aluminium lighter holder handle. This knife also includes pocket clip/money clip for easy to carry.
Comes in the colors: Yellow, Red, Blue, Black

DESCRIPTION OF GANZO G743-1 KNIFE:
Ganzo G743-1 model looks distant and laconic. The design of this knife is more classic than sportive. Nevertheless, it is equally convenient to use it for both everyday tasks and nature or camping trips. The main material of this knife is 440C stainless steel. It is widespread in the knife industry due to good tolerance of real-life conditions and keeps high-quality sharpening for a long time. The knife blade is sharpened completely smooth and, therefore, it is convenient to cut any food, and many other materials. All cutting sections are accurate and flat. Blade length of this knife is 87 mm. Strength is provided by the metal thickness of 3 mm. The metal surface is treated using a hot-pressing technique. This is a smooth grinding, in which the blade remains barely visible bar marks indicating the direction of metal processing. 
Ganzo G743-1 has a combined handle. Area near the blade (about one-third of the length) is also made of steel and has the same treatment as the blade. On the remaining part, both handle sides have cover plates from fiberglass composite known as G10. They are bolted to the base by two small bolts. The surface of cover plates is roughened by applying a small knurling. This helps to keep the knife in the hand even tighter if the palms are wet. One side of the handle has a fixed clip that is also made of steel. Its relocation is impossible in this model.
Characteristics:
Convenient folding knife;
Blade material is 440C steel;
Blade size is 87 mm;
Handle length is 113 mm;
Knife weight is 130 grams;
Handle material is G10;
Smoothly sharpened blade.
Warranty period is 1 year from the date sale of the item.

Knife Type
Folding
Lock Type
Frame Lock
Blade Edge
Plain
Point
Spear Point
Blade Material
440С
Blade Color
Gray
Handle Material
G10
Handle Color
Black, Green, Orange
Total Length, mm
200
Blade Length, mm
87
Blade Thickness, mm
3
Knife Weight, g
130
Warranty
1 year

DESCRIPTION OF GANZO D727M KNIFE:
Ganzo 727M model is designed to meet at maximum the needs of tourists and other country lovers, and people who need a pocket knife on a daily basis. This folding knife works effectively with a variety of materials: food, textiles, sticks, etc. Therefore, it will be an excellent support tool for fishermen, campers, servicemen.
The base material for Ganzo 727M knife is D2 stainless steel. It is corrosion resistant, but it is rather hard (60 HRC) alloy which is widely used in production of tourist knives. The blade length reaches 8.9 cm and its thickness from the spine side is 3.5 cm. The knife is entirely smoothly sharpened that allows smooth and accurate cuts.
The handle of every Ganzo 727M knife is covered with straps from G10 fiber-glass plastic. This is a modern composite material with high wear resistance and ability to withstand exposure to many chemically active substances. Four color options for handles are available to choose: black, green the handle surface is textured for firm handling. Also, the producers thoughtfully placed a clip ton the handle to fasten the knife to the belt and a hole for threading the lanyard. 
Characteristics:
Folding knife design;
Total length of unfolded knife is 21 cm;
Blade size is 8.9 cm;
Thickness of blade spine is 0.35 cm;
Blade is made of D2 stainless steel;
Handle straps are made of G10 fiber-glass plastic;
Total knife weight is 117.5 gram.
Warranty period is 1 year from the date sale of the item.

Knife Type
Folding
Lock Type
G-Lock
Blade Edge
Plain
Blade Material
D2 (60 HRC)
Blade Color
Gray
Handle Material
G10
Handle Color
Black or Green
Total Length,
210
Closed Length,
121
Blade Length,
89
Blade Thickness,
3,5
Knife Weight, g
117.5
Warranty
1 year

DESCRIPTION OF GANZO G302-Н:
Ganzo G302-Н is a multi-tool based on the already well-known model from Ganzo brand. However, there are changes in metal processing as well as in the shape of some tools. As a result, the customers received another nice example of a practical tool the use of which each owner will be able to evaluate in practice. All tools, as well as the case of multi-tool Ganzo G302-Н, are made of steel 440C. This is a high quality alloy of stainless steel. It may be used in conditions of frequent contact with water which is typical for hiking, fishing trips and hunting. Minimal maintenance of the tool ensures durability and safety of the external qualities. Pliers are the main tool in arrangement of the multi-tool. They are equipped with cutting pliers and have a firm grip for nuts, bushings and other objects that are circular in cross-section. Other tools are arranged between two handles of the multi-tool and are inside them. They are: two knives (normal and serrated), a saw, openers for cans and bottles, scissors, an awl, a small slotted screwdriver with a magnetic holder for interchangeable bits, tool for removing insulation from wires. The multi-tool goes together with a set of necessary screw-drivers with a variety of screws. They are in a coon organizer. This organizer together with the multi-tool can be stored in a nylon case.
The surface of all tools and handle is chromium-plated. The multi-tool is very durable and practical and, therefore, it will be an excellent purchase both for own needs and useful present.
Characteristics:
Full-sized tool;
Pliers with grip for circular-shaped objects and cutting-pliers;
Smoothly sharpened and serrated knives;
Additional set of screw-driver bits;
Nylon case;
Chromium-plated surface;
Material in use is 440C steel.
Warranty period is 1 year from the date sale of the item.

Multi-Tool Type
Full-Size
Functions
27
Components
two knives (normal and serrated), a saw, openers for cans and bottles, scissors, an awl, a small slotted screwdriver with a magnetic holder for interchangeable bits, tool for removing insulation from wires.
Blade Material
440C
Lock Type
Axis Lock
Multi-Tool Color
Silver
Dimensions in the folded state (L*W*Т),
10,5x5x2
Closed Length,
105
Weight, g
260
Warranty
1 year
Holster / Sheath Included
Yes

DESCRIPTION OF GANZO G740 KNIFE:
Ganzo G740 knife differs from other models by a rather impressive size. Due to the folding design, you still can easily take it with you on a nature trip and use it both for typical work and the most complex tasks. The knife blade is made of high-carbon stainless steel 440C. This alloy is well balanced regarding corrosion resistance and metal hardness. Therefore, this knife does need specific care: no rust on fishing or hiking, remains sharp even with long and constant use. The blade length of this model is 9.5 cm. It is smoothly and regularly sharpened lengthwise. The blade thickness is also slightly bigger than it is usually offered by Ganzo company and makes 4 . This powerful blade can easily cut meat, cut the small branches, prepare cuts to make the fire.
The knife handle has two cover plates made of durable fiberglass G10. Its strength factor is completely enough for a knife that will be used in hunting and touristic purposes. The handle has a fixed steel clip that helps to fix the knife on the belt not to lose it. Additionally, it is possible to fix the insurance lanyard on the wrist or on the backpack strap. The handle colour in this model can be black, orange or green. 
Characteristics:
Folding pocketknife;
Blade length is 9.5 cm;
Butt width is 0.4 cm;
Material is 440C steel;
Steel hardness is 58HRC;
Handle material is G10;
Knife weight is 155 grams.
Warranty period is 1 year from the date sale of the item.
Knife Type
Folding
Lock Type
G-Lock
Blade Edge
Plain
Blade Material
440C
Blade Color
Gray
Handle Material
G10
Handle Color
Black, Green
Total Length,
230
Blade Length,
95
Blade Thickness,
4
Knife Weight, g
155
Warranty
1 year

Survival bracelets can be a rapid dismantling of the rope as you need, into a fully load-bearing I weight a lifeline.
Length: 18cm (not including buckle)
Full length about: 25cm
Width: about 1.9cm
Material: metal, nylon
Weight: about 25g

Survival bracelets can be a rapid dismantling of the rope as you need, into a fully load-bearing I weight a lifeline.
Length: 18cm (not including buckle)
Full length about: 25cm
Width: about 1.9cm
Material: metal, nylon
Weight: about 25g

Paracord bracelet with a built-in charger for cellphones. For that crucial moment when you need a charge to your phone or in need of a paracord rope.

Survival bracelets can be a rapid dismantling of the rope as you need, into a fully load-bearing I weight a lifeline.
Length: 18cm (not including buckle)
Full length about: 25cm
Width: about 1.9cm
Material: metal, nylon
Weight: about 25g

Paracord bracelet with a built-in charger for cellphones. For that crucial moment when you need a charge to your phone or in need of a paracord rope.

Small, Waterproof Keyring Lighter

The FireStash keyring lighter is revolutionary in lighting fires, encased in a waterproof canister, no fire is too big for this pocket-sized lighter. The stylish and safe design makes it the ideal companion for campers and explorers. Simply attach it to your key ring for your convenience.
With a dark chrome plated zinc alloy body, the FireStash is compact, yet tough and solid.
A neoprene ‘O’ ring secures the lighter from any water, meaning you have a working lighter even in the pouring rain. Simply refill the lighter with lighter fluid for repeated use.
The keyring lighter can be easily refilled, making it a long-lasting and reliable tool for outdoor enthusiasts. Simply attach it to your key ring for, and you'll never be without a working lighter again.

The Gidgitz Dino Bottle Opener is a fun animal-shaped bottle opener & keyring, is a useful gift and is the perfect size to carry anywhere.

Paracord bracelet with a built-in charger for cellphones. For that crucial moment when you need a charge to your phone or in need of a paracord rope.

Blade Length: 9cm Total Length: 21cm Folding Length: 12cm Premium Stainless-Steel Blade: Resists corrosion and maintains a sharp edge for long-lasting performance. Premium Stainless-Steel Blade: Resists corrosion and maintains a sharp edge for long-lasting performance. Durable Aluminium Handle: Lightweight yet robust, the handle offers a comfortable and secure grip with its textured surface. Reliable Liner Lock Mechanism: Ensures the blade stays firmly in place during use, preventing accidental closure. Pocket Clip: Allows for convenient and safe carry in your pocket or on your belt. Versatile Design: Perfect for tactical applications, outdoor adventures, and everyday tasks. Durable Aluminium Handle: Lightweight yet robust, the handle offers a comfortable and secure grip with its textured surface. Reliable Liner Lock Mechanism: Ensures the blade stays firmly in place during use, preventing accidental closure. Pocket Clip: Allows for convenient and safe carry in your pocket or on your belt. Versatile Design: Perfect for tactical applications, outdoor adventures, and everyday tasks. 3 in 1 Knife: It is not only a foldable knife, but also a glass breaker and seatbelt cutter

Blade Length: 9cm Total Length: 21cm Folding Length: 12cm Premium Stainless-Steel Blade: Resists corrosion and maintains a sharp edge for long-lasting performance. Durable Wood Handle: Lightweight yet robust, the handle offers a comfortable and secure grip with its wooden surface Reliable Liner Lock Mechanism: Ensures the blade stays firmly in place during use, preventing accidental closure. Pocket Clip: Allows for convenient and safe carry in your pocket or on your belt. Versatile Design: Perfect for tactical applications, outdoor adventures, and everyday tasks

Features:
- Spring Assisted Knife
- 3.5" 3mm Thick Blade, Stainless Steel
- Rainbow Ti-Coated Acid Etching Blade
- 4.5" Closed
- Rainbow Ti-Coated Stainless Steel, Sculpted Ninja Art Handle
- Includes Gold Ti-Coated Pocket Clip And Glass Breaker

The very versatile Criterion Collection M series integrates convenience and functionality. Everything in this group will assist with that home chore or unexpected outdoor emergency. Open: 165 mm / 6.45″ Closed: 96 mm / 3.78″ Blade length: 71 mm / 2.79″ Blade thickness: 2.3 mm / 0.09″ Weight: 158 g / 5.57 oz Blade material: 12C27 Handle material: G10 Functions: 18 Lock: Slip joint

SPECIFICATIONS:

• Weight 0.40 lbs
• Type Spring Assisted Style
• Total Length 8.80″
• Handle Material Aluminum
• Handle Lock Type Liner Lock
• Handle Artwork Light Blue
• Blade Length 3.80″
• Blade Finish Full Color Transfer
• Blade Material 3Cr13
• Blade Edge Type Fine
• Edge Blade Shape Clip Point
• Features Pocket Clip

Survival bracelets can be a rapid dismantling of the rope as you need, into a fully load-bearing I weight a lifeline.
Length: 18cm (not including buckle)
Full length about: 25cm
Width: about 1.9cm
Material: metal, nylon
Weight: about 25g

The modern keychain knife is a compact knife with stylish, modern design.

This perfectly sized knife features a carabiner clip to easily and quickly attach and remove from your keychain. The 3.8cm clip point blade is crafted from 8Cr13MoV stainless steel, in both a mirror and black oxidized finish.