The F88 bolt kit allows you to replace any damaged or lost caliper bolt in your caliper. The bolt kit is designed for a F88 caliper with 1.25" rotor width. The kit comes with 4 main caliper bolts, 4 main caliper bolt washers, 1 bridge bolt, 1 bridge bolt spacer, 1 bridge bolt washer, and 1 bridge bolt locking nut.