Martin Tool & Forge's Heavy Duty Striking Wrenches are drop-forged and include Heavy Duty Offset 12 point, Straight Pattern 12 point and Roughneck Straight Pattern six point. For use where extreme force is necessary to loosen or set large fasteners, these Striking Wrenches are heat treated for extended life. Twelve-point styles from 1" through 4-3/4" and 32mm to 80mm; six-point straight pattern 1-1/16" through 3-7/8".