Designed to work perfectly with Capri Tools Interchangeable Torque Wrench and other compatible interchangeable torque wrenches Heavy duty steel construction Premium matte finish 14 mm x 18 mm drive, compatible with interchangeable torque wrench with 14 mm x 18 mm drive cavity 22 mm open end The Capri Tools Interchangeable Torque Wrench Head is designed to work perfectly with Capri Tools Interchangeable Torque Wrench. It is also compatible with other interchangeable torque wrenches with 14 mm x 18 mm cavity. The torque wrench head is made with heavy duty steel with a premium matte finish. It has a 14 mm x 18 mm drive. This is a 22 mm open end torque wrench head.