Caliper piston clip. Left.2WD W/COIL SPRING SUSPENSION. Right.2WD W/COIL SPRING SUSPENSION. A Clip which snap onto the steering knuckle abutment or Brake caliper Bracket, used to provide a smooth channel for disc Brake pads to ride in and to reduce viBration and rattling. Caliper Mounted. Disc Brake Pad Retaining Clip. pads Mount kit. pads tension spring. Caliper piston. Disc Abutment. Disc Anti - Rattle. Disc Pad Retaining. Retainer SPRING. Included with: Caliper.