Tap and die has size permanently marked. All taps are plug style and have recommended drill size laser marked on the side. Plastic storage case. Contains: tap and 1" hexagon die sizes 4-40 NC taper, 6-32 NC taper, 8-32 NC taper, 10-24 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, 12-24 NC 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 and 1/8-27 NPT pipe; one die stock for 1" round or hexagon dies; 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"; and one tap adapter driver for tap sizes 1/4" through 1/2".