... drop-forged and heat-treated. 3) Aluminum handle. hand tools. aluminum handle pipe wrench1) aluminum handle.2) Hook jaw drop-forged ... and heat-treated3) Aluminum handle4) size: from 8 ... Line CapacityActual Units Produced(Previous Year)Aluminum Pipe Wrench,rigid style,steel pipe clamps423,496 PCS per month4,024, ...