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- Large Stepped Drill Bit - The stepped drill bit is constructed with 12 drill bit diameters: 6-60mm (6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm). Unique enlarger holes, no need to replace the drill bit or the positioning hole during use.
- Material - The stepped cone cutter is made of HSS4241 high-speed steel with titanium coating on the surface. Rust-resistant, wear-resistant, and heat-resistant, for a longer lifespan.
- Spiral Design - The 135-split tip and 2-flute double-edged design ensure faster, smoother cutting, stable removal and better shaving removal. The three-sided shank fits securely into the power tool chuck and prevents slipping. Surface depth gauges make drilling precise.
- Cool by water - For parts whose hardness is less than 25°; For materials such as metal, wood, aluminum alloys, plastic plates, insulating plates, etc
- What you get - 1 helical drill. Drilling speed 250-400 rpm recommended. Note: All data are measured manually, please allow an error of 1-3cm; due to the difference in light and display, there would be some color difference, please refer to the actual item received.
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