Unique Bargains CR-MO High Torque Metric 12-Point Square 1/2" Drive Impact Sockets Black

Made of chrome-moly steel construction for strength and durability. To prevent rust and corrosion, the black phosphate finish absorbs and retains oil, repelling moisture. 12-point opening is suitable for double hex (12-sided), hex, and square fasteners, and can grab fasteners quickly at multiple angles. To prevent round-off under stress, it grips the flat sides of fastener heads instead of the corners. The through-hole at the drive end locks on the tang of drivers or impact wrenches, so it won't fall off or stick on the fastener head. Widely used in DIY hand-making, household maintenance, and most general repairs.