3PCS Cobalt Step Drill Bit Set for Stainless Steel & Hard Metal,M35 HSS Unibit with TiAlN Coating,Spiral Flute Design,1/8"-1/2", 1/4"-3/4", 3/16"-7/8" for Iron, Aluminum, and Alloy Drilling
All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
【Premium M35 Cobalt Construction】 Engineered from industrial-grade M35 cobalt high-speed steel with a TiAlN coating, these step drill bits deliver exceptional hardness, heat resistance, and cutting performance. Designed to stay sharper longer—ideal for drilling through stainless steel, iron, aluminum, and other tough metals.
【Superior Cutting Efficiency】 Each bit is heat-treated and hardened to 64–67 HRC, ensuring precise, burr-free holes even in hard materials. The spiral flute design promotes smooth chip evacuation, reduces friction, and prevents clogging for faster, cleaner drilling.
【Wide Size Range & Compatibility】 Includes three step drill bits covering a range from 1/8" to 7/8" (1/8"-1/2", 1/4"-3/4", and 3/16"-7/8"), suitable for hole enlargement or new drilling. Compatible with drill presses, milling machines, and cordless drills—perfect for professionals and DIY metalworkers alike.
【Maximize Tool Life with Proper Use】 For optimal performance, use cooling oil and maintain a low drill speed (250–400 RPM) when cutting metal. Avoid using impact drivers to prevent uneven torque and premature wear—ensuring your bits last longer and perform consistently.
ColumPRO 3PCS Strong Magnetic Drill Bit Extension Holder for Impact Driver,1/4" Hex Shank S2 Steel Magnetic Screwdriver Extension,Straight Without Bending Drill Bit Extender,2, 4, 6-inch Extensions
KWD 5.500
-10%
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3PCS Cobalt Step Drill Bits for Hard Metal, 1/8" to 7/8" M35 Unibit Set with Cobalt TiAlN Coating for Stainless Steel, Iron, Aluminum (SAE)
KWD 19
