Profile: Gison Machinery Co., Ltd. is a producer of air tools. We are an ISO 9001 certified company. Our product range comprises impact wrench and ratchet wrench, grinder, sander, polisher, wet abrasive tool, die grinder, micro grinder, screw driver, drill, riveter, hammer, needle scaler, pavement breaker, cutting tool, stapler, blow gun and other accessories. Our butterfly air impact wrench is a lightweight aluminum housing to reduce operator fatigue. Ring retainer is used for positive socket retention. It is suitable for small fastener work in engine & body repair shops, on carburetor, ignitions, body panels, bumper & fender struts, and for small engine.