Yankee Hill Machine 2007: This heavy duty wrench was designed to work with YHM\'s 1.375\"-24 HUB mounting systems. On one side you\'ll find a 3/4\" open ended wrench made to loosen/tighten Q.D. Mounts and Direct Thread mounts. On the other, a spanner made to fit around HUB adapters as well as a 1/2\" Torque wrench slot to help tighten things to a specific torque spec.Heat treated Melonite QPQ finish. HUB Spanner Wrench. 3/4\" Open Ended Wrench. 1/2\" Torque Wrench. Length: 7.75\". Weight: 5.792 Oz.. Works perfectly with YHM\'s Phantom Q.D. mounting system