Profile 1pc Cromo Driver
• Manufactured at Profile Racing's U.S.A. plant using aerospace grade titanium (lighter than chromoly). These CNC machined cassette drivers fit all of Profile Racings cassette hubs.
• Pawls & springs not included. (sold only as a set - 4 springs and 4 pawls).
• 9, 10 or 11T.
• It is important to also replace your chain whenever you install a new driver or cog. A worn, stretched chain will cause your driver or cog to wear out much faster."