ZELCAN Step Drill Bit Set, 5PCS HSS Titanium Drill Bits for Metal, 50 Sizes in 5 High Speed Steel Unibit Stepped Drill Bit for DIY Lovers Electrician, 1/8 to 1-3/8 Inches

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Different Sizes 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). 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. 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.