... Steel for tap and die Packing: Blow case + color sleeveSpecification:5PC UNC Taps: 1/4-20, 5/16-18, 3/8-16, 7/16-14 ... , 1/2-135PC UNF Taps: 1/4-28, 5/16-24, 3/8-24, 7/16-20, 1/2 ... -205PC UNC Dies: 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2 ... -135PC UNF Dies: 1/4-28, 5/16-24, 3/8-24, 7/16-20, 1/2 ...