These are high-carbon steel bits with standard brad points.
They do not enter as cleanly, clear chips as well, or stay sharp as long as our HSS bits. These are suitable for the hobbyist, or where occasional use does not justify the higher cost of a HSS bit.
Bits have shank sizes of 10mm for 10mm to 20mm bits, and are shanked to size for all other bits.
Imperial sets available separately.