1. Material: Plastic + Metal 2. Securely locks the freewheel during assembly and disassembly, preventing freewheel spin and significantly reducing the difficulty of rear wheel gear disassembly and repair. 3. The clamping process will not scratch the gear teeth; it does not slip under high torque, effectively protecting the original freewheel. 4. Compact size, easy to store in a bicycle repair tool bag. 5. Can be used with a static return piston or a planar push-to-return piston. 6. Can be inserted into caliper spaces wider than 24mm.
