Attributes . 1/4 in, 5/16 in, 5/64 in, 7/64 in, 5/32 in, 3/8 in, 6 - 32 NC, 8 - 32 NC, 10 - 24 NC, 1/2 in - 13 NC, 1/2 in - 20 NF Metric Plug Tap and 5/8 in Hexagon Dies in sizes: 3mm - 0.50, 1/4 in - 28 NF, 1/8 in - 28 BSP Drill Bit Sizes: No. 3, 10 - 32 NF, 10mm - 1 . Names