Brake pads hardware kit. Left.HD. PERFORMANCE. Rear. REGENERATIVE BRAKES. Right.HD. w/o regenerative. A Kit containing Hardware for a vehicle's Disc Brake caliper Brake system. A set of clips, 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. Abutment Clip Set. Anti - Rattle Clip Set. Pad Installation. pads spring. Caliper slide. Included with: Brake pads.