●The ratchet improves efficiency. These wrenches are well suited for repetitive work.
●By replacing the sockets, various sizes of fasteners can be tightened within the tool's capacity range.
●By reversing the ratchet, the wrench  can be used to loosen fasteners counter-clockwise.
●Tightening to a torque setting can only be done clockwise.
●Accuracy:±3% of indicated value over the full range.