Square drive universal extension wrenches, metric, standard and tension type wrenches from Apex Fastener Tools, formally Cooper Tools. Hard-to-reach areas are no problem with the wide range of universal extension wrenches from Apex tools. Quality design and construction give Apex universal wrenches a long service life and durability. Remember, universal extension wrenches, are not to be used with impact drivers.Apex also offers a universal extension wrench with a tension sleeve that holds the socket at the desired driving angle while aligning the tool and fastener. Other universal extension wrenches can ”flop” making engagement difficult. Apex universal extension wrenches are available with a longer socket to allow a stud to recess into the socket opening.