Positz 11 Speed Reusable Chain Connector Quick Power Links - Pack of 4 Value pack of 4 chain links for 11 speed chains Suits Shimano 11 speed road &amp; MTB chains: Dura Ace, Ultegra, Di2, 105, etc Suits SRAM 11 speed road &amp; MTB chains: RED, eTap, Force, Suits Campagnolo 11 speed road &amp; MTB chains: Super Record, Record, EPS, Chorus, Easy to install (no tools required) - can be reused