Medium Fold Up Hex Key Set, Plastic, Includes Key Sizes: 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32 & 1/4, Sizes Clearly Marked On Handle For Easy Identification, Flat Spring In Case Bottom Holds Keys At Any Angle, 8650 Chrome Nickel Alloy Steel Drawn To A Tolerance Of Plus .000/Minus .001, Hex Corners Are Sharp & Clean.