4 Flute countersinks (or machine countersinks) are designed for countersinking holes for centers or for enlarging existing holes
Also called magnetic drills or mag drills
Easy Installation: User-friendly design allows for quick and hassle-free installation
Why Choose Drill America - 3/4-28 UNS HSS Bottoming Tap
Drill America - 4 x 3/64 x 1 Plain Metal Slitting Saw
5 Piece Set with 1" Depth of Cut - nACo (Nano-Composite) Coated Blue Annular Cutter - High Performance & Durable Cutting Tool | Drill America Hot Deals 4 Flute countersinks (or machineSizes: 9 16", 11 16", 13 16", 15 16"" and 1 1 16" X 1" Depth of Cut in a Plastic Case. nACo Blue Coated Annular Cutters provides prolonged tool life compared to traditional HSS. Cuts difficult materials, including steel, cast iron, heated and stainless steels. m2 High Speed Steel. Cuts only necessary material for fast, efficient, quality hole making. 3 4" Weldon Shank fits most magnetic drill presses. Also called magnetic drills or mag drills. For use