A cast cutter is a device that removes cast material without damaging underlying tissues (e.g. skin), and the walking heel, among others. Pneumatic cast saws designed to cut casts using a serrated blade that oscillates at a very high speed perpendicular to the axis of the machine without full rotation. These saws are handheld instruments with a pneumatic motor, a mechanism to drive the blade, and a hose connected to the pressurized gas source. Cast saws are usually handheld instruments and are available less frequently as tabletop stationary devices. Oscillating pneumatic cast saws are used to cut casts using dedicated plaster or fiberglass blades for cast removal, creation of a hinged cast, or to open a window in the cast to view underlying tissue; they may also be used to cut plaster and