This is an excellent bicycle tool that can be used as a 5-function tool with a single tool. 1. Missing link tool 2. Missing link hold 3. Wire cut 4. End cap tightening 5. Drill holes in the wire cutting surface, as a chain tool for maintenance around the missing links. You can use all the functions of the wire from cutting to punching. For general bicycle maintenance work such as road bikes, mountain bikes, cross bikes, and macharis.