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Designed for easy torque calibrations.
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
Torque Adapter, 1/2 Inch, 3/8 Inch Drive, 12 Point, 2 Inch Center To Center
From the Manufacturer
Proto torque adapters are designed with a center-to-center dimension of 2". This means that the distance from the center of the square drive of the mating torque wrench to the center of the fasteners is exactly 2". This constant dimension serves to simplify the process of calculating the torque applied. The box end wall thickness is specially engineered to provide strength while still allowing ample room for access to reach difficult fasteners.
Stanley Proto J5116 3 8 Drive Torque Adapter 1 2 B001HW8Z0C