9-in-1, small, fold up, hex key set, plastic, includes key sizes: .050, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32 & 3/16, sizes clearly marked on the handle for easy identification, flat spring in case bottom holds keys at any angle, 8650 chrome nickel alloy steel drawn to a tolerance of plus .000/minus .001, hex corners are sharp & clean.