5/8 in. x 1 in. nACo Blue (Nano-Composite) Coated Annular Cutter with Pilot Pin nACo blue coated annular cutters provides prolonged tool life compared to traditional HSS Cuts difficult materials, including steel, cast iron, heated and stainless steels Cuts only necessary material for fast, efficient, quality hole making 3/4 in. Weldon shank fits most magnetic drill presses Also called magnetic drills or mag drills For use with magnetic drill press only, do not use with a standard hand drill or drill press Comes with pilot pin 1 in. D of cut Drill America nACo Blue Coated Annular Cutters are designed for fast, efficient hole making and last up to 30% longer then traditional high speed steel cutters. These cutters cut only that material necessary to produce a quality hole. They have a 3/4 in. Weldon shank and are for use with magnetic drill presses only. Bit Material: High Speed Steel Drill Bit Type: Machining Drill Bit Drill Bit Type(s) Included: Machining Drill Bit Features: Iron,Cast