A drill piece, also known as a drill BIT, is a cutting tool used to create cylindrical holes in materials such as wood, metal, and plastic. It consists of a rotating helical screw blade, usually made of hardened steel, that cuts through the material as it is rotated. The drill piece is held in place by a chuck or collet, which is connected to the drill's motor. The drill piece is available in a variety of sizes and shapes, depending on the type of material being drilled.