Spiral-flute taps pull chips out and away from the hole as the tap moves into the hole to create threads, which helps prevent chips from packing in the hole. They create internal threads in blind holes and are installed into a toolholder on a machine such as a lathe or CNC machine to operate. General purpose taps are intended for threading a wide range of materials. High-performance taps are harder and more wear-resistant than general purpose taps, and they provide better precision and accuracy than general purpose taps.