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. Four hex bit options are included, allowing the cyclist to select functions most frequently used Compatible with Wolf Tooth axles that have threaded axle bolt Compatibility Works with Wolf Tooth threaded rear axles Tech Specs Weight: 28g Included: 4 Bits - Hex 2, 2.5, 3, 4; Torx 10, 25 (choose 2 for storage in tool) and axle receiver Material: 6061-T6 aluminum Made in the USA