11 Piece, Fractional Inch-Sized Hex Key Set, Pro Folding With Extended Reach Blades, Key Sizes: 1/2, 3/8, 5/16, 1/4, 7/32, 3/16, 5/32, 9/64, 1/8, 7/64, 3/32-inch, High Leverage Blades Open Independently Up To 270 Degrees, Blades Are Made Of Tough, Heat Treated Alloy Steel & Range From Approximately 3.5" To 4.5".