Knives in the context of Side knife

An edged weapon, or bladed weapon, is a hand-to-hand combat weapon with a cutting edge. Bladed weapons include swords, daggers, knives, and bayonets. Edged weapons are used to cut, hack, or slash; some edged weapons (such as many kinds of swords) may also permit thrusting and stabbing. Edged weapons contrast with blunt weapons such as maces, and with pointed weapons such as spears.

Many edged agricultural tools such as machetes, hatchets, axes, sickles, sling blades, and scythes, have been used as improvised weapons by peasantry, militia, or irregular forces – particularly as an expedient for defence.

A hand tool is any tool that is powered by hand rather than a motor. Categories of hand tools include wrenches, pliers, cutters, files, striking tools, struck or hammered tools, screwdrivers, vises, clamps, snips, hacksaws, drills, and knives.

Outdoor tools such as garden forks, pruning shears, and rakes are additional forms of hand tools. Portable power tools are not hand tools.

A bolo (Tagalog: iták/gulok, Ilocano: bunéng, Ibanag: badáng/aliwa, Pangasinan: baráng, Kapampangan: paláng, Bikol: tabák/minasbad, Cebuano: súndang/kampilan, Waray: sansibar, Hiligaynon: sandúko/binangon, Aklan: talibong) is a general term for traditional pre-colonial small- to medium-sized single-edged swords or large knives of the Philippines that function both as tools and weapons. Bolos are characterized by a wide curved blade that narrows down to the hilt, and that comes with a pointed or a blunt tip.

Bolos are sometimes incorrectly described as a type of machete (as bolo machete), due to their similarities in use and shape. But bolos are not related to the machete. Bolos are pre-colonial in origin and have very different characteristics. The most obvious physical difference between the two is the shape of the cutting edge, which is typically curved in bolos and more or less straight in machetes.

Hand-to-hand combat is a physical confrontation between two or more persons at short range (grappling distance or within the physical reach of a handheld weapon) that does not involve the use of ranged weapons. The phrase "hand-to-hand" sometimes includes use of melee weapons such as knives, swords, clubs, spears, axes, or improvised weapons such as entrenching tools. While the term "hand-to-hand combat" originally referred principally to engagements by combatants on the battlefield, it can also refer to any personal physical engagement by two or more people, including law enforcement officers, civilians, and criminals.

Combat within close quarters, to a range just beyond grappling distance, is commonly termed close combat or close-quarters combat. It may include lethal and non-lethal weapons and methods depending upon the restrictions imposed by civilian law, military rules of engagement, or ethical codes. Close combat using firearms or other distance weapons by military combatants at the tactical level is referred to in contemporary parlance as close-quarters battle. The United States Army uses the term combatives to describe various military fighting systems used in hand-to-hand combat training, systems which may incorporate eclectic techniques from several different martial arts and combat sports.

Cutting tool materials are materials that are used to make cutting tools which are used in machining (drill bits, tool bits, milling cutters, etc.) but not other cutting tools like knives or punches.

Cutting tool materials must be harder than the material of the workpiece, even at high temperatures during the process.

Bladesmithing is the art of making knives, swords, daggers and other blades using a forge, hammer, anvil, and other smithing tools. Bladesmiths employ a variety of metalworking techniques similar to those used by blacksmiths, as well as woodworking for knife and sword handles, and often leatherworking for sheaths. Bladesmithing is an art that is thousands of years old and found in cultures as diverse as China, Japan, India, Germany, Korea, the Middle East, Spain and the British Isles. As with any art shrouded in history, there are myths and misconceptions about the process. While traditionally bladesmithing referred to the manufacture of any blade by any means, the majority of contemporary craftsmen referred to as bladesmiths are those who primarily manufacture blades by means of using a forge to shape the blade as opposed to knifemakers who form blades by use of the stock removal method, although there is some overlap between both crafts.

A cutting board (or chopping board) is a durable flat surface on which to place material for cutting. The kitchen cutting board is commonly used in food preparation with knives; other types exist for cutting raw materials such as leather, rubber or plastic. Kitchen cutting boards are often made of a plank of hardwood or polyethylene, and come in various widths and sizes.

Knife juggling is a variant of toss juggling using blunt knives as props which are thrown and caught. Although knives are sometimes juggled recreationally, it is generally a performance art. Knife juggling is typically seen performed by street entertainers as part of a routine, or at art or historical festivals.

The knives are thrown with vertical spin, lending them stability in the air, and are typically allowed to rotate once or twice before being caught. Knife juggling can be performed with any number of objects, but the vast majority of performers use three knives. Patterns used are usually basic and consist solely of a cascade, and sometimes involve simple juggling tricks such as an under the leg throw. This is due to the unwieldy nature and increased weight of knives and the increased level of danger when compared to such props as juggling clubs.