GTC Machining (formerly known as Garrity Tool Company) is a precision contract machining company that caters to aerospace, defense, bio-medical, and automotive sectors. It offers inspection and coordinate measuring machines (CMM), computer numerical control (CNC) lathes, horizontal and vertical mills, swiss turn, and other capabilities. The company uses various materials: aluminum, beryllium copper, brass, inconnel, plastics, carbon, alloy, titantium, tungsten, etc.