Dual-lever trigger mechanism uses same motion as mountain shifters with separate pull and release levers 2-position adjustable bar clamp for custom ergonomics Stand-alone design to allow use with various brake options Use with Rival and Force 11-Speed Groups, can be used with WiFLi Rear Derailleurs and compatible cassettes Standard bar clamps included and MatchMaker X compatible Flat bar Pair 2x11s 1 to 1 BlkUPC/EAN/GTIN: 710845764332