Performance Tool W36980 1/4" Drive SAE 6 Piece Flex Socket Set Sizes: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16 in. Chrome vanadium alloy steel construction for strength and durability Polished nickel chrome plated finish resists corrosion For use at home, shop, or on the road repairs. Socket openings are designed to reduce fastener rounding Includes metal clip socket rail