Mishimoto T-Bolt Clamps are constructed from rust-proof stainless steel and offer improved durability over traditional worm gear clamps.You can be sure that everything will stay in place because Mishimoto Stainless Steel T-Bolt Clamps are equipped with self-locking nuts. Mishimoto Stainless Steel T-Bolt Clamp, 3.86" - 4.17" (98MM - 106MM) MMCLAMP-4 Universal Fitment