Caliper retainer kit. Front. Left. Right. A pin used with a float style Caliper, which Mounts the Caliper to a Caliper bracket through a Caliper guide pin bolt, allowing the Caliper to slide freely during braking. Disc Brake Caliper Bolt. Disc Brake Caliper Hardware Kit. Incl.Guide Pin Boot,Guide Pin Cover. Included with: Caliper.