13 Piece Standard Hex Key Set, 0.050 IN, 1/16 IN, 5/64 IN, 3/32 IN, 7/64 IN, 1/8 IN, 9/64 IN, 5/32 IN, 3/16 IN, 7/32 IN, 1/4 IN, 5/16 IN, 3/8 IN Hex, 2.8 - 6.8 IN Arm Length, L Handle, Chrome Nickel Alloy Steel, Black Oxide, Included: Plastic Holder, ANSI B18.3, Federal Specification GGG-K-275D