Stanley Proto J5100 3/8" Drive SAE Torque Adapter Set, 12 Point, 9PC

Designed for easy torque calibrations | Adapters measure 2-inch 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 | Box end wall thickness is specially engineered to provide strength while still allowing ample room for access to reach difficult fasteners | 12 point box end allows for fine indexing, helping to improve speed and access. Fits 4, 6 and 12 point fasteners, Made in USA