Motion Pro is dedicated to producing the most versatile, unique and durable products for professional and home use. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions. One of their goals is to offer tools of convenience. Do it right the first time with Motion Pro Tools. Torque any fastener with a combination wrench or Allen wrench. Will work with 6 mm (1/4") through 19 mm (3/4") combination wrenches. Will work with 6 mm and 8 mm Allen wrenches. Heat-treated steel with a black oxide finish. 3/8" square drive is rated for a maximum torque of 90 lb/ft.