Motion Pro Adapter - Torque Wrench - Adjustable860277304 Product Description Will work with most 6 mm 19 mm metric and most 1 4" 3 4" fractional SAE combination wrenches Torque any fastener with a combination wrench or hex wrench 3 8" square drive is rated for a maximum torque of 100 lb ft Features a clamping range between 6. 5 mm and 24 mm Heat treated steel with a black oxide finish Made in the USA