These are high-carbon steel bits with standard brad points. This seven piece set includes 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 7/16″ and 1/2″ bits with two outside spurs for droilling clean holes for dowels, pilot holes and other drilling projects. They do not enter as cleanly, clear chips as well, or stay sharp as long as our HSS bits but are very suitable for the hobbyist, or where occasional use does not justify the higher cost of HSS bits.