The Jonard Linemans B Wrench is used on pole line hardware. The wrench is forged and heat treated. It is an open-ended double end type with two sizes of openings at each end and an oval hole for turning pole steps. The end openings accommodate nuts for 3/8", 1/2", 5/8", and 3/4" bolts and the head of the 1/2" drive screw. Plus, the faces of the openings are offset to provide handle clearance.