Adapters measure 2 from the center of the square drive to the center of the adapter opening. Special heat-treated alloy steel helps to increase strength and durability., Made in USA Measuring Tools Diesel Head Bolt OEMTOOLS 24208 Torque Adaptor Ford 6.0L Power S The box end wall thickness is specially engineered to provide strength while still allowing ample room for access to reach difficult fasteners. Torque Wrench 3/8 Stanley Proto J6121NMF 1/2 In. Drive 50-250 NM Dial Torque Wrench – USA Digital Torque Adapter Wrenches - Torque Adapter This constant dimension serves to simplify the process of calculating the torque applied. Product Features. • Designed for easy torque calibrations • Adapters measure 2 in from the center of the square drive to the center of the adapter opening