The Guardair ReverseForce Air Gun, No. 75RF048AA, extracts metal chips and debris from deep inside axle housings, machine cavities and gear boxes. According to the company, standard air guns with conventional nozzles can drive metal chips and debris deep into sensitive mechanical equipment, causing failure and future maintenance problems. The ReverseForce directs compressed air back toward the opening, thereby expelling chips and debris from the interior. ReverseForce, which is made in the U.S.A., has a durable cast aluminum with a hanging hook, nozzle and extension, a wide trigger for comfort and a 1/4" FNPT inlet.