Compatible with any chain up to 13-speed, including Sram Flattop chains (from serial number X2) Knurled knob with 4 settings: wide and BMX chains, 7 to 10-speed Shimano and Sram chains, Campagnolo chains with 11 to 13 speeds, rivet impression on Campagnolo chains with 11 speeds Fine-tuning for a perfect fit Hardened removable pin WARNING: The knurled knob must make contact with the chain, otherwise the chain and/or the tool may be damaged. See user manual