Easy Readjustment For readjusting brake pistons on floating calliper systems with or without locking device for hand brakes. For clockwise and anti-clockwise brake pistons. The Welzh low profiler design allows use on the smallest and largest brake callipers on the market. Example: Mini, BMW 1 Series (smallest brake calliper at present) to BMW X7 (largest brake calliper at present). Pneumatic mechanism together with swivelling rotary level allows effortless easy and quick resetting. Universal Application Thanks to 25-piece UPDATED adapter set. Works on 99% of all vehicles.