This Yankee Hill Machine heavy duty wrench was designed to work with the 1.375"-24 HUB mounting systems. On one side you'll find a 3/4" open ended wrench made to loosen/tighten YHM Q.D. Mounts and Direct Thread mounts. On the other, a spanner made to fit around the Yankee Hill HUB adapters as well as a 1/2" Torque wrench slot to help tighten things to a specific torque spec. FeaturesHeat treated Melonite QPQ finishHUB Spanner Wrench3/4" Open Ended Wrench1/2" Torque WrenchLength: 7.75"Weight: 5.792 Oz.Works perfectly with Phantom Q.D. mounting system