This kit
Includes:: one upper aluminum disc & the new reversible 1/4” 3/8” bolt. It is a convenient solution to upgrade to the latest version of aluminum discs & bolts. All aluminum discs include the Safe Lock material that reduces vibrations & improves the locking grip between head & disc. Furthermore the disc, together with the new bolts, allow a faster & more secure operation. It can be locked in position without the need of additional tools & the special shape of the b