SuperboltsThese Kizer Superbolts are very low volume mounting screws made for hex keys. In case you strip the hex we made another socket around it so can be still opened without problems. But hope this never happens as they are made out of the best Chromoly steel available and heat treated to perfection. The set contains 12 pcs, 4x12mm + 4x15mm + 4x18mm for all your frame and boots needs you might have.