Features These 1/2" drive metric impact sockets have a one-half inch square drive that's compatible with drive tools of the same size. They come in metric sizes that are measured in millimeters to fit fasteners with a metric size head. Socket Size / 17 mm Socket Shape / 6-Point Drive Type / Impact Drive Size / 1/2 inch Compatible Fastener Type / Bolts Tether Ready / No Material / Alloy Steel Finish / Black Oxide Impact Rated / Yes Socket Length / 3-9/64 inch Non-Magnetic / No Non-Sparking / No