Double O-Ring Design: Solve the problem of lock ring damage caused by tool shaking during disassembly and assembly CNC Finishing: High strength aluminum alloy material, the inner teeth are closely fitted with the lock ring, better force transition Compatibility: For 12 Speed Chainring/M7100/M8100/M9100 XT SLX Easy To Use: Weighs 40g, easy to carry Note: The tool needs to be used with a 32mm wrench or TL-FC32 wrench (Not included)