Flare nut ratchets: the wrench opens to pass around the pipe and closes down on the nut for optimum grip. The special shape of the wrench allows for a ratchet effect. Fast tightening on all piping in automotive, trucking, public works, compressors, refrigeration, aeronautics, sanitation. 6-point head: 7 to 10 mm - 12-point head: 11 to 32 mm. Hanging hole at end of handle: wrenches stored on panel or hung to avoid loss or fall. Metric sizes: 7 to 32 mm. Presentation: satin chrome handle / burnished head.