Hydraulic Make-up/Break-out Units is a king of machine for making up and breaking out thread jo int,which is suitable for the assembly and disassembly of downhole pump,downhole tools, tubing,sucker rod,casing and other thread joint tools.This product has the following features: · Unit's head and backup tong clips or loosens simultaneously. · Unit's head and backup tong have four planetary claws with bi-direction clipping mechanism.Don't need to change any part in application range.