A hacksaw's a fine-tooth saw with a blade under tension in a frame, used for cutting materials such as metal or bone. Hand-held hacksaws consist of a metal arch with a handle, usually a pistol grip, with pins for attaching a narrow disposable blade. A screw or other mechanism's used to put the thin blade under tension. The blade can mounted with the teeth facing toward or away from the from the handle, resulting in cutting action on either the push or pull stroke. On the push stroke, the arch… (More on Hacksaw)