S.U.R.&R. brake bleeder removal tool kits feature specially-sized pins which are inserted into the bleeder screw to prevent the walls from collapsing. After applying a shock with the air chisel, the bleeder case hardens and screw threads loosen, making screw removal simple and safe. Additional features include a decreased risk of the damaging screw and caliper, and the tools are safe for use with both aluminum and cast iron calipers. No drilling, tapping, or heating is required. S.U.R.&R. kits include a portable carrying case to store your tool, adapters, replacement pins and screws.