24 Piece, SAE Fractional Tap & Hex Die Set, Dies Are Ideal For Routine Maintenance, Repair Work & For Rethreading Where High Accuracy & Tolerance Thread Is Not Critical, Taps Have Straight Flutes Which Are Ground To Provide Rapid Chip Removal For Efficient Threading, Designed For Hand Threading Work In A Variety Of Materials Taps Produce A Class 2B Thread, Includes Fractional 1/4" x 20NC, 1/4" x 28NF, 5/16" x 18NC, 5/16" x 24NF, 3/8" x 16NC, 3/8" x 24NF, 7/16" x 14NC, 7/16" x 20NF, 1/2" x 13NC, 1/2" x 20NF Taps & Dies, Pipe 1/8" x 27NPT Tap & Die, Plain Die Stock For 1" Dies, Offset Adjustable Tap Wrench For Taps #0 - 1/2".