Compatible Models: Compatible with Shimano XTR 9120, M9100, M7100, XT 8100, XT SLX and other Shimano direct mount chainrings Double O-Ring Seal: Prevents the tool from sliding during use and causing damage to the locking ring For lockrings with 41mm outside diameter and 16 notches Sturdy Quality: High strength aluminum alloy material, CNC machining to zero tolerance, the inner teeth and the locking ring are closely matched for better force transition.Light weigh of 40g How To Use: The tool needs to be used with a 32mm wrench or TL-FC32 wrench (Not Included) 12 Speed Bicycle Chainrings Lock Ring Removal Tool, Bike Direct Mount Lockring Tool for Shimano XTR 9120, M9100, M7100, XT 8100, XT SLX Mountain Bike Road