* Made of chrome vanadium steel construction for strength and durability.* With black phosphate finish, to protect against rust and corrosion.* Has 6-point opening that snugly fits the hex shape of fastener heads, allowing it to apply maximum torque without slipping.* To prevent round-off under stress, it grips the flat sides of fastener heads rather than the corners.* The through-hole in the drive end locks onto the tang of impact wrenches or drivers so it won't fall off or stick on fastener heads.* Widely used in DIY hand-making, household maintenance, and most general repairs.
