20PCS Metal Drill Bits for Hard Steel,Cobalt Drill Bits for Metal,Steel Drill bits for HardSteel,Cast Iron,Copper, Aluminum,Wood
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Product description
- High-quality material The twist metal drill bits for hard steel is made of cobalt-containing high-speed steel, quenched at high temperature, and the overall baking yellow treatment improves wear resistance and reduces the friction coefficient.
- Package includes You will receive 20 drill bits for metal, 3mm drill bits*10 + 4mm drill bits*5 + 5mm drill bits*5. The contour is rounded and suitable for standard drill chucks and conventional round chucks.
- No center punch required The 135 drill tip double back angle design does not require pre-drilling or center punching, quickly penetrates the metal plate with less pressure, prevents tool movement, and removes debris and particles faster.
- How to use When using, the steel drill bits for hard steel should be perpendicular to the metal plate and kept cool. If you need to drill metal, please try to use it on a bench drill. These cobalt drill bits can be used for column drills, handheld electric drills, battery-powered drills, etc., and can also be used for CNC machine tools.
- Widely applicable These hss drill bits are suitable for wood, plastic, stainless steel, thin metal plates (steel and aluminum) and body panels, mild steel, not for concrete masonry.
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