Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box. Various Sizes: 115 sets of drill bits include 29pcs Fractional Size:1/16 to 1/2 in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60. M35 Cobalt Drill Bit: The M35 cobalt drill bit is a durable, sharp and robust drill bit suitable for cutting stainless steel, iron castings, copper, aluminum and other soft metals as well as plastics, wood etc. Quick and Efficient: The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135 degree point tip and twist design for faster cutting, self-centering to prevent walk-off and faster chip and particle removal. HSS M35 Drill Bit Set: HSS Jobber Length Drill Bit Kit for hardened steel with excellent cutting performance. 115 sets of drill bits for long term use. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling. Easy Storage: The drill set includes drill holders with size indexes and is packaged in a small, strong package for easy storage and sorting. If you have any questions, please refer to us and we will be happy to help you. Material: High Speed Steel, Stainless Steel, Alloy Steel, Cobalt Steel, High Carbon Steel, Cobalt. Cutting Diameter: 0.06 Inches. Cutting Angle String: 135 Degrees. Product Dimensions? 15.35 x 6.3 x 4.33 inches; 7.28 Pounds. Item model number? MACXCOIP. Date First Available? June 8, 2022. Country of Origin? China. Best Sellers Rank: #3,881 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #12 in Jobber Drill Bits. #12 in Jobber Drill Bits. Customer Reviews: 4.3 4.3 out of 5 stars 1,200 ratings. And we will work with you to resolve it to your satisfaction.