Available in MM unit and INCH unit.MM Sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8 and 10mm.Inch sizes: 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 1/4", 5/16" and 3/8".This TOPTUL ball point hex key wrench set is made of high grade nickel chrome molybdenum alloy steel.Premium quality steel is well tempered and h..