SAE 12-Point impact socket, 1″ drive are used to tighten or loosen nuts, bolts and other fasteners where it is necessary to apply greater force or torque pressure than can be applied with hand accessories. The set includes: 1-3/8”, 1-7/16”, 1-1/2”, 1-9/16”, 1-5/8”, 1-3/4”, 1-13/16”, 1-7/8”, 1-15/16”, 2”, 2-1/8”, 2-3/16”.