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, 1.42" - 1.57" (36MM - 40MM) MMCLAMP-15 Universal Fitment