BrakeQuip's Bleeder Buster Kit, No. BQ2200 easily removes frozen bleeder screws. The kit works by installing the wire plug into the bleed screw to prevent the walls of the bleed screw from collapsing and removing. Apply direct impact to the bleed screw for about three or four seconds to compress and work harden the bleeder screw and "shock" the threads free. Works on both cast iron and aluminum.