Shimano TL-BR52 Bleed Adaptor & O-ring Bleed tools for Shimano brake systems After use install a plug fitting or re-install bleed screw Threads into the caliper in place of bleed screw Use TLBR52 in place of a wrench on the bleed screw, to open and close bleed fitting by hand Shimano Disc Brake Bleed Kits and Tools