Left.2WD. Mount kit. Right.2WD. TWIN I BEAM. 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. From 10/22/2012. Kit. bushing. hardware. support retainer. Disc Brake Bolt. Disc Brake Slide Pin. GUIDE. Repair. Included with: Adapter, Caliper.