HOD HEALTH AND HOME Australia has been operating online and instore for 8 years. All products come with a 1 year warranty, fast shipping and special offers added to our site daily.. M35 Cobalt Step Drill Bit High Hardness M35 Cobalt Step Drill Bits Are Designed For Precision Drilling In Stainless Steel Hardened Steel And Other High-Hardness Materials. Ideal For Both Hand Drills And Bench Drills These Bits Ensure Clean Accurate Holes With Long-Lasting Durability When Used Correctly. Features High-Hardness Material: Made From M35 Hss Cobalt Suitable For Stainless Steel And Hardened Steel. Step Drill Design: Allows Multiple Hole Sizes With A Single Drill Bit For Convenience And Efficiency. Versatile Sizes: Available In Multiple Ranges: 4-12 Mm (4 5 6 7 8 9 10 11 12 Mm) 4-20 Mm (4 6 8 10 12 14 16 18 20 Mm) 5-21 Mm (5 7 9 11 13 15 17 19 21 Mm) 5-27 Mm (5 7 9 11 13 15 17 19 21 23 25 27 Mm) 4-32 Mm (4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 Mm) Compatible With Drills: Can Be Used With Hand Drills For Thickness ≤ 1 Mm / 0.04 In And Bench Drills For Thickness 2-3 Mm / 0.08-0.12 In. Cooling Recommended: Use Water Or Cutting Fluid During Drilling To Extend Bit Lifespan. Optimal Speed: Low Rpm (Around 100) Recommended For Stainless Steel To Avoid Overheating. Specifications Material: M35 High-Speed Steel (Hss) With Cobalt Hole Sizes: Various Step Ranges (4-12 Mm 4-20 Mm 5-21 Mm 5-27 Mm 4-32 Mm) <