Sealey air impact wrench 3 4 sq drive super duty heavy twin 750lb ft sealey sa604 twin hammer mechanism utilizes oversized hammers and specially strengthened hammer cage to pull even more torque out of the precision air motor precision made components fit closely to reduce air leakage and maximize power flip reverse control on the rear of the tool with four position air regulator on the handle base suitable for heavy tyre shop use sealey sa604 air impact wrench 3 4 sq drive super duty heav