3/4” square drive SAE universal 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 impact universal extension wrenches are made from a tougher and more ductile alloy steel which is then heat treated for extra durability. 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. Apex universal extension wrenches are available with a longer socket to allow a stud to recess into the socket opening.