550 Heavy-Duty Cobalt Jobber Drill Bit Set 60 Piece Sizes 1 To 60 Self-Centering With Gold Oxide Finish For Ferrous Metals Extended Tool Life And Smooth Drilling Through Hard Materials
✔️ 60-piece cobalt steel set, 135° split point, gold oxide finish
This 60-piece jobber-length drill bit set is made from cobalt steel and finished with gold oxide, designed for ferrous metals. Use it in metalworking, machining, and industrial DIY projects where tough materials demand long tool life and clean, precise holes.
✅ Set includes sizes #1 to #60 (60 bits) for complete range
✅ Self-centering 135-degree split point reduces wandering
✅ Gold oxide finish lubricates and resists wear on ferrous metals
✅ Extra thick web increases strength and rigidity
✅ Made in the USA with careful quality control
💡 What is a cobalt drill bit set best used for in hard ferrous metals? This handy kit is built for heavy metal drilling tasks. - For drilling stainless steel, cast iron, and other tough metals - Self-centering 135-degree split point helps prevent wandering - Gold oxide finish provides lubrication and wear resistance - Cobalt steel construction extends tool life when drilling hard materials
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