Designed to apply largest torque, the 6-point of the TEKTON 3/8 in. x 8 mm profound Socket snugly fits the hex shape of fastener heads, so there 's no opportunity for slipping. To prevent round off, it the flavorless sides of fasteners rather than the corners. With an extra-deep broach, it over long-life, rib shafts to access nuts. click inside the drive end securely wrestling hold socket onto ratchets and extensions, so it wo n't fall off or stick on fasteners. Made from payment Cr vanadium steel, it 's from rust and corrosion by a long-lived mirror Cr plated finish.