The SK 11-pc Flare Nut Ratcheting Wrenches Set feature SAE sizes from 3/8" to 1". The ratcheting jaw allows the tool to advance the flare nut without removing the wrench from the fastener. Opening the pivoting head allows the wrench to reach around connected pipes to access the fastener. The versatile design can be used on six and 12 point tube fittings, hydraulic lines, fasteners, valves, and compression fittings. The wrenches are made in the U.S.A. and feature a lifetime warranty.