Stab wounds are incised wounds where the length of injury on the surface is less than the depth of penetration into the body, and are the result of a thrusting action, where the force is delivered along the long axis of a narrow, pointed object. The force of impact is concentrated at the tip of the implement, and the sharper the tip, the easier it will penetrate the skin. The weapons of choice in the majority of assaults - both domestic and 'on-the-street' include lock knives, sheaf knives and kitchen knives.