National Coarse & National Fine - High Speed Steel - In Plastic CaseSizes: 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 5/8-11, 5/8-18, 3/4-10, 3/4-16Plug Taps, 1-1/2" O.D. Solid Round Dies, Straight Handle Tap Wrench, Die Stock