8-In-1, Fold Up, Hex Key Set, Includes: .050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64" & 5/32", Sizes Are Clearly Marked On The Handle For Easy Identification, Keys Are Held In Any Work Position Or Angle By A Flat Spring In The Bottom Of The Case, Made From 8650 Chrome Nickel Alloy Steel Drawn To A Tolerance Of Plus .000/Minus .001, Hex Corners Are Sharp & Clean.