This standard tap and die set contains standard high-carbon steel plug taps and hexagon dies. The high quality high carbon steel allows for long life. This set contains the following tap and dies sizes: #4-40, #6-32, #8-32, #10-24, #10-32, #12-24, 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, and 1/2-20. It also contains a 1/8-27 NPT tap, two t-handle tap wrenches, a tap and reamer wrench, an adjustable die stock, a screw driver, and a screw pitch gauge. Packed in a high quality plastic case.