Installed in a 4pot 40mm CNC caliper(20.4756.xx) or 2pot 84mm CNC caliper(120.A441.xx) which has no pad spring, the springs suppress an unpleasant rattling noise caused by play of the brake pads while the brake is released.

For 4pot 40mm CNC calipers: 20.4756.xx
KOK-1022