The most versatile taps for hand use or machine tapping in a wide variety of materials in through or blind hole applications. Available in 3 chamfer lengths - taper, plug, and bottoming. Taper - 7-10 pitch chamfer length. Plug - 3-5 pitch chamfer length. Bottoming - 1-2 pitch chamfer length. Premium substrate with bronze oxide body and shank reduces rust and corrosion. Bright finish flutes improve chip flow in soft or non-ferrous materials.