(2Pcs) Diamond Step Hole Opener 20mm 35mm 50mm - M10 Thread Drill Bit for Marble, Granite, Tile & Concrete Drilling — Open-Box, 39% Off

🔹 3-in-1 Step Design for Versatile Drilling This diamond step drill bit set features 20mm, 35mm, and 50mm stepped sizes in one tool, eliminating the need for multiple bits. It supports precise hole expansion, chamfering, and reaming, drastically improving work efficiency for both DIY and professional projects.

🔹 Premium Diamond-Coated Construction Coated with high-density industrial-grade diamond particles, the bit delivers an ultra-sharp, long-lasting cutting edge. It easily penetrates and cuts through hard materials including marble, tile, granite, quartzite, concrete, and microcrystalline stone with minimal effort and heat buildup.

🔹 M10 Thread with Multi-Tool Compatibility Equipped with a standard M10 thread for direct attachment to 100mm angle grinders. The included conversion shank allows quick adaptation to handheld electric drills, making it suitable for a wide range of construction and renovation scenarios.

🔹 All-in-One Multi-Function Performance Integrates drilling, hole expansion, chamfering, and light polishing in a single bit. Perfect for creating clean, precise holes in countertops, tiles, stone slabs, and concrete surfaces—ideal for plumbers, tilers, contractors, and DIY enthusiasts.

🔹 Package Includes 2 x Diamond Step Drill Bits (20mm/35mm/50mm) 2 x Conversion Shank (for electric drill adaptation)

🔹 Fast, Efficient & Labor-Saving Operation Engineered for high-speed, low-friction cutting to reduce drilling time and fatigue. The stepped profile ensures stable, accurate hole placement and smooth edge finishing, delivering professional results every time.

🔹 Note Always use water cooling during operation to extend bit life and ensure clean cuts. Confirm your tool’s thread size (M10) before purchase for proper fit.

(2Pcs) Diamond Step Hole Opener 20mm 35mm 50mm - M10 Thread Drill Bit for Marble, Granite, Tile & Concrete Drilling