Wolf Tooth Axe Handle Multi-Tool – Red. The Wolf Tooth Axle Handle Multi-Tool is a minimalist lightweight option to cover essential tool functions. It is stored at the end of an axle during rides as a multi-tool that is easy to access for quick adjustments and trailside fixes. On one side of the handle is a 5mm hex end stepped to 6mm closer to the handle that fits into the end of an axle. The other side of the handle has a 4mm opening for two double-sided hex bits that nest on the inside of the handle via magnet. This multi-tool is compatible with Wolf Tooth axles that have threaded axle bolt.