Motion Pro adjustable torque wrench adapter. Torque any fastener with a combination wrench or Allen wrecnh. Will work with 6mm (1/4 inch) through 19mm (3/4 inch) combination wrenches. Will work with 6mm and 8mm Allen wrenches. Heat treated steel with a black oxide finish. The 3/8 inch square drive is rated for a maximum torque of 90 ft-lbs.