WHOLESALE 9pc SAE IMPACT MAGNETIC NUTSETTER SET Sizes: 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2". Magnetic shaft holds fasteners securely to free up your hands,especially in tight paces. Laser etched markings. Shank: 1/4" hex. Overall length: 2".