58 Piece Professional Tap and Die SetEach high carbon steel tap and die has size and starting side permanently marked on each. Plastic storage case is constructed of sturdy, blow molded plastic.58 piece set that contains: tap and hexagon die sizes 6-32 NC, 8-32 NC, 10-24 NC, 12-24 NC, 1/4-20 NC, 5/16-18 NC, 3/8-16 NC, 7/16-14 NC, 1/2-13 NC, 9/16-12 NC, 5/8-11 NC, 3/4-10 NC, 10-32 NF, 1/4-28 NF, 5/16-24 NF, 3/8-24 NF, 7/16-20 NF, 1/2-20 NF, 9/16-18 NF, 5/8-18 NF, 3/4-16 NF, 1/8-27 NPT and 1/4-18 NPT; one tap wrench for No. 4 through 1/2″; one tap wrench for 1/4″ through 1/2″; one die stock for 1″ round or hexagon dies; one die stock for 1-1/2″ round or 1-7/16″ hexagon dies; one T-handle tap wrench for No. 0 through 1/4″; one thread gauge for 10 to 40 US; one screwdriver 1/8″ x 2-1/4″ with pocket clip; and screw extractors No. s 1 through 5.

√ Tap Taps: 8 to 10 threads chamfered for easy starting in tough materials.
√ Plug Taps: 3 to 5 threads chamfered for general use when tapping to bottom of hole is not critical (this is the most widely used type of tap).
√ Bottoming Taps: 1-1/2 threads chamfered for use where thread must go to bottom of hole.
√ Heat treated and tempered carbon tool steel. Smooth, accurate threading.
√ 58 piece set