Taps & Die Sizes Included. Fractional Sizes - 22 PC. Set - 1/4" To 1/2” Includes Coarse and Fine Threads. Consisting of the following sizes: 1 each Tap and 1 each Round Die 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. Also includes 1 T-Handle Tap Wrench and 1 Die Stock.