Eklind imperial folding ball end, hex- allen keys x 5 in a long metal case. The Classic Steel Fold-up sets are compact to fit most easily in your pocket. Eklind keys are American made using Eklind Alloy Steel to exceed ANSI standards. Includes 3/16 , 7/32 , 1/4 , 5/16 , 3/8" keys.