Large, medium and small fold-up hex key sets available with sizes: .050”, 1/16”, 5/64”, 3/32”, 7/64”,1/8”, 9/64”, 5/32”, 3/16”, 7/32”, 1/4”, 5/16” and 3/8”. The 5 size large (5-1/4” long) set includes 3/16” thru 3/8”; the 8 size large (5-1/4” long) set includes 3/32” thru 1/4”; the 9 size medium (4-1/4” long) set includes 5/64” thru 1/4” the 9 size small (3-1/2” long) set includes .050” thru 3/16”; and the 8 size small (3” long) set includes .050” thru 5/32”. Made of best grade chrome nickel alloy steel, hardened and tempered for long life. Carded.