ZELCAN Step Drill Bits, HSS 5PCS Titanium Step Drill Bit Set, 50 Sizes in 5 High Speed Steel Unibit Drill Bits Set for Sheet Metal with Aluminum Case, Multiple Hole Stepped Up Bits for DIY Lovers

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About This Extreme Durability: Cobalt high speed steel drill bits along with the titanium coating ensures extreme durability, will stay new and shiny for years to come. Different S izes of Holes Can Be Drilled: Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. chuck sizes. You are capable to drill holes in different sizes which can meet your normal needs. Smooth Drilling: Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits). Use Center Punch to Mark the Spot: Please mark the spot that you are to drill for easier drilling and improved drill bits life. Keep Your Step Drill Bits Well Organized: All the bits come in a well-organized case for easy transport and storage. Overview Material : Cobalt, High Speed Steel (HSS), Titanium Cutting Diameter : 0.38 Inches Finish Type : Titanium Shank Type : Triangle Cutting Angle String : 135 Degrees Show more