Features UNIVERSAL COMPATIBILITY FOR VERSATILE USE: Torque any fastener using a standard combination wrench or hex/Allen wrenches. This torque wrench adapter works with a wide range of wrench sizes, including most 6 mm to 19 mm metric and 1/4" to 3/4" SAE combination wrenches, as well as 6 mm to 8 mm hex allen wrenches. Allowing you to torque virtually any fastener—even in tight, hard-to-reach spaces where traditional sockets or torque wrenches can’t fit. .