18 piece, combination short & long arm hex-l key set, includes short: .050″, 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 5/32″, 3/16″ & 7/32″, includes long: 1/16″, 5/64″, 3/32″, 1/8″, 9/64″, 5/32″, 3/16″, 1/4″ & 5/16″, made of 8650 chrome nickel alloy steel, black oxide finish to resist rust, corners are sharp & clean.