This heavy duty wrench was designed to work with YHMs 1.37524 HUB mounting systems. On one side youll find a 34 open ended wrench made to loosentighten Q.D. Mounts and Direct Thread mounts. On the other a spanner made to fit around HUB adapters as well as a 12 Torque wrench slot to help tighten things to a specific torque spec.Heat treated Melonite QPQ finish. HUB Spanner Wrench. 34 Open Ended Wrench. 12 Torque Wrench. Length 7.75. Weight 5.792 Oz.. Works perfectly with YHMs Phantom Q.D. mounting system