Each high carbon steel tap and die has size and starting side permanently marked on each. All taps are plug style and have recommended drill size laser marked on the side.
Plastic storage case is constructed of sturdy, blow-molded plastic.
21741 is a 75 piece tap and die set in plastic case that includes the following: tap and 1″ hexagon die sizes 4-40 NC taper, 6-32 NC taper, 8-32 NC taper, 10-24 NC taper, 12-24 NC taper, 1/4-20 NC taper, 5/16-18 NC taper, 3/8-16 NC plug, 7/16-14 NC plug, 1/2-13 NC plug, 10-32 NF taper, 1/4-28 NF taper, 5/16-24 NF taper, 3/8-24 NF plug, 7/16-20 NF plug, 1/2-20 NF plug, 1/8-27 NPT pipe, 1/8-28 BSP pipe, 3 mm x 0.50 taper, 3 mm x 0.60 taper, 4 mm x 0.70 taper, 4 mm x 0.75 taper, 5 mm x 0.80 taper, 5 mm x 0.90 taper, 6 mm x 1.00 taper, 7 mm x 1.00 taper, 8 mm x 1.25 taper, 9 mm x 1.00 plug, 9 mm x 1.25 plug, 10 mm x 1.25 plug, 10 mm x 1.50 plug, 11 mm x 1.50 plug, 12 mm x 1.50 plug and 12 mm x 1.75 plug; one tap wrench for tap sizes No. 4 through 1/2″; one T-handle tap wrench for tap sizes No. 0 through 1/4″; one T-handle tap wrench for tap sizes 1/4″ through 1/2″; one die stock for 1″ round or hexagon dies; one metric thread gauge for .45 mm through 2.50 mm threads; one thread>