Large Fold Up Hex Key Set, Plastic, 6-In-1, Includes Key Sizes: 5/32, 3/16,7/32, 1/4, 5/16 & 3/8, Sizes Are Clearly Marked On Handle For Easy Identification, Flat Spring In Case Bottom Holds Keys At Any Angle, 8650 Chrome Nickel Alloy Steel Drawn To Tolerance Of Plus .000/Minus .001, Hex Corners Are Sharp & Clean.