SRAM Power Lock T-Type Eagle Black PVD 12-Speed Chain I Have The Powerrrr Lock If you need to take the chain off your bike for cleaning or you need to replace a bad link, a chain connector makes everything easy. The SRAM Power Lock T-Type is designed to use with T-Type chains and provides the same rugged dependability as its predecessors. It has a black oxide and nickel and PVD finish and requires no tools to install. Features Designed to work with T-Type chains No tools required for installation Chain connector finish: Black Oxide, Nickel+PVD | Sram | Powerlock T-Type Eagle | Black | Pvd 12 Spd Chain Cn Pwr. lck T-Type Eagle Blk Pvd 12S 4Pcs