General purpose, roll forged drill bit, produced to DIN338 standard. For drilling holes in steel, cast iron, non-ferrous metal and plastic. These general-purpose drill bits from Toolpak are perfect for drilling holes in a wide variety of materials such as steel, cast iron, non-ferrous metal and plastic. The cobalt drill bits are heat and wear-resistant, helping them perform for longer and extending the working range. A 135deg split point tip means you don't have to centre-punch first, and will get an easier skid-free start-up too. The bits produce clean, accurate and burr-free holes. * General-purpose roll-forged drill bits * For drilling holes in steel, cast iron, non-ferrous metal and plastic * 135deg split point tip - easier to start drilling without skidding * Heat and wear-resistance * Manufactured to DIN338 standard * Always use cutting oil when drilling metals * For use in handheld rotary drills or bench/pillar drills with a three-jaw drill chuck Toolpak Cobalt Drill Bit 3.5mm (2 Pack) Steel. This 3.5mm Cobalt Drill Bits 2PK 456921 is an ideal addition to anyone's tools, whether it be for the garden, garage or DIY. Cobalt Drill Bits 2PK 3.5mm M35 high speed steel with 5% cobalt for strength and wear resistance. 135° split point prevents walkaround. Fully ground with amber finish. Manufactured to DIN338. Always use cooling agent. Warranty: LIFETIME for all hand tools; 3 YEAR for power tools, air & petrol tools. Silverline-Tooltime 456921 5055058111937. Silverline Cobalt Drill Bits 2pk 3.5mm DIY Power Tool Accessories. HSS precision ground from M35 high speed steel bars with 5% cobalt. For alloys, hardened steels, cast irons, titanium and other hard-to-drill materials such as stainless steel. Always use cooling agent.