66-pc set in plastic case includes the following items: Machine Screw Plug Tap and 5/8" Hexagon Dies in sizes : 4 - 40 NC, 6 - 32 NC, 8 - 32 NC, 10 - 24 NC, 10 - 32 NF, 12 - 24 NC Fractional Thread Plug Tap and 1" Hexagon Dies in sizes : 1/4" - 20 NC, 1/4" - 28 NF, 5/16" - 18 NC, 5/16" - 24 NF, 3/8" - 16 NC, 3/8" - 24 NF, 7/16" - 14 NC, 7/16" - 20 NF, 1/2" - 13 NC, 1/2" - 20 NF Fractional Thread Plug Tap and 1-7/16" Hexagon Dies in sizes : 9/16" - 12 NC, 9/16" - 18 NF, 5/8" - 11 NC, 5/8" - 18 NF, 3/4" - 10 NC, 3/4" - 16 NF Fractional Thread Plug Tap and 1-13/16" Hexagon Dies in sizes : 7/8" - 9 NC, 7/8" - 14 NF, 1" - 8 NC, 1" - 14 NS Pipe Thread Plug Tap and 1" Hexagon Dies in sizes : 1/8" - 27 NPT, 1/4" - 18 NPT Threading Tools: Adj. Die Stock - 1" Hexagon Dies, Adj. Die Stock - 1-7/16" Hexagon Dies, Adj. Die Stock - 1-13/16" Hexagon Dies, Plain Die Stock - 5/8" Hexagon Dies, Adj. Handle Tap Wrench - Taps No. 0 to 1/2", Adj. Handle Tap Wrench - Taps 1/4" to 1", Two-in-One Tap Wrench - Taps 1/4" to 1/2", T-Handle Wrench - Taps No. 0 to 1/4", 18 Leaf Standard Thread Pitch Gauge