OEMTOOLS 25317 8mm and 10mm Brake Bleeder Wrench For bleeding air from brake systmes with 8 mm or 10 mm bleeder screws Opens and closes the brake cylinder bleeder screws to bleed the air from the system Heavy wall design prevents stretching Grips bleeder screw without slipping S-2 steel for strength and durability 2 piece design for added strength Chamfered drive end for quick attachment