Stanley Proto J5100 3/8-Inch Drive Torque Adapter Set， 12 Point， 9-Piece<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Designed for easy torque calibrations</li><li>Adapters measure 2-inch from the center of the square drive to the center of the adapter opening</li><li>Special heat-treated alloy steel helps to increase strength and durability</li><li>Box end wall thickness is specially engineered to provide strength while still allowing ample room for access to reach difficult fasteners</li><li>12 point box end allows for fine indexing， helping to improve speed and access. Fits 4， 6 and 12 point fasteners</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51nZUJjDYtL.jpg" noproxy>