Hougen "12,000-Series" cutters were the original annular cutters, invented over 35 years ago. With the most features of any annular cutter, "12,000-Series" annular cutters provide the best performance in the largest variety of materials. Say goodbye to traditional twist drills and embrace cutting-edge efficiency. Click here to see other available cutting depths. PLEASE SELECT YOUR CUTTER DIAMETER FROM THE DROP-DOWN MENU BELOW: