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Top layer shrinks and curls up due to the strain Crack pattern in clay exposed to the air. Naturally forming mudcracks start as wet, muddy sediment dries up and contracts. A strain is developed because the top layer shrinks while the material below stays the same size.
An OTF knife, showing the sliding blade being extended from the handle. A sliding knife is a knife that can be opened by sliding the knife blade out the front of the handle. One method of opening is where the blade exits out the front of the handle point-first and then is locked into place (an example of this is the gravity knife).
A seax (Old English pronunciation:; also sax, sæx, sex; invariant in plural, latinized sachsum) is a small sword, fighting knife or dagger typical of the Germanic peoples of the Migration Period and the Early Middle Ages, especially the Saxons. The name comes from an Old English word for "knife". [1]
A hunting knife with a deer-antler handle. Hunting knives are traditionally designed for cutting rather than stabbing, and usually have a single sharpened edge. The blade is slightly curved on most models, and some hunting knives may have a blade that has both a curved portion for skinning, and a straight portion for cutting slices of meat.
A slipjoint knife is one of the most ubiquitous types of pocketknives.A slipjoint knife consists of a handle with one or more folding blades. These blades are held in position by a strong "backspring" which biases them towards the open and closed position (that is the spring tries to hold the blade closed until it has been pulled past a 90 degree arc from the handle, when the spring force ...
A machete (/ m ə ˈ ʃ ɛ t i /; Spanish pronunciation:) is a broad blade used either as an agricultural implement similar to an axe, or in combat like a long-bladed knife. The blade is typically 30 to 66 centimetres (12 to 26 in) long and usually under 3 millimetres (1 ⁄ 8 in) thick.
Modern bayonets are often intended to be used in a dual role as both a combat knife and knife bayonet. [4] Improvised edged weapons were extensively used in trench warfare of the First World War ; for example, an entrenching tool might be modified to take an edge and be used as a melee weapon.
A simple penknife A 16th century depiction of using a penknife on a quill. Penknife, or pen knife, is a small folding knife. [1] Today penknife is also the common British English term for both a pocketknife, which can have single or multiple blades, and for multi-tools, with additional tools incorporated into the design.