Combination metric and standard long arm hex key set. 22-piece set contains 13 inch 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″, plus 9 metric sizes: 1.5 mm., 2 mm., 2.5 mm., 3 mm., 4 mm., 5 mm., 6 mm., 8 mm., and 10 mm. Chrome nickel alloy steel heat-treated for strength. Black oxide finish. Includes plastic holders for each set. Carded.