A knife (plural knives, from Old Norse knifr 'knife, dirk') is a tool or weapon with a cutting edge or blade, often attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2. 5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades, blade patterns and styles vary by maker and country of origin. Knives can serve various purposes. Hunters use a hunting knife, soldiers use the combat knife, scouts, campers, and hikers carry a pocket knife, there are kitchen knives for preparing foods (the chef's knife, the paring knife, bread knife, cleaver), table knives (butter knives and steak knives), weapons (daggers or switchblades), knives for throwing or juggling, and knives for religious ceremony or display (the kirpan). Parts A modern knife consists of:the bladethe handlethe point the end of the knife used for piercingthe edge the cutting surface of the knife extending from the point to the heelthe grind the cross section shape of the bladethe spine the thickest section of the blade, on a single-edged knife, the side opposite the edge, on a two-edged knife, more toward the middlethe fuller a groove added to make the blade lighterthe ricasso the flat section of the blade located at the junction of the blade and the knife's bolster or guardthe guard the barrier between the blade and the handle which prevents the hand from slipping forward onto the blade and protects the hand from the external forces that are usually applied to the blade during usethe hilt or butt the end of the handle utilized for blunt forcethe lanyard a strap used to secure the knife to the wristThe blade edge can be plain or serrated, or a combination of both. Single-edged knives may have a reverse edge or false edge occupying a section of the spine. These edges are usually serrated and are used to further enhance function. The handle, used to grip and manipulate the blade safely, may include a tang, a portion of the blade that extends into the handle.
Objects Steak Knife Kitchen Opendays
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