Designed for drilling in stainless steel - Are you looking for drills with which you can make clean cuts in stainless steel? Drills that work fast, deliver precise results and do not wear out quickly? PRO Stainless Steel HSS-Co twist drills are stable and do not migrate, allowing clean and precise holes to drill - over and over again. PRO Stainless Steel HSS-Co drill bits are a good choice for builders and installers who need durable drill bits for drilling in stainless steel and other metals. They have been manufactured from high quality cobalt reinforced high-speed steel (HSS-Co) and ground to ensure high wear and heat resistance. They have a centring point so you can place the holes exactly where they should be. This allows you to work faster and benefit from the performance of the drill for a long time. Cylindrical shaft is suitable for cog drill chucks