M10 Diamond Step Drill Bit Set 20 35 50mm for Tile Concrete Marble Granite | For Angle Grinders and Drills, Chamfering and Polishing Holes in Tile and Stone with Diamond Coating, Crack Prevention

M10 Diamond Step Drill Bit Set —Precise Cuts for Tile, Stone & Concrete Upgrade your stone drilling work with this 20/35/50mm diamond step drill bit. It drills, reams, chamfers and polishes holes in one pass — no chipping, no rough edges. No complicated setup needed Key Features: 20mm, 35mm, 50mm multi-step design M10 threaded shank plus conversion rod Works on porcelain, ceramic, marble, granite, quartzite, microcrystalline stone and concrete, great for countertop and bathroom renovation Heat & wear resistant, delivers smooth burr-free holes Package Includes: 2 x Diamond Step Drill Bit, 1 x Conversion Rod

• Diamond Step Drill Bit Set 20mm, 35mm, and 50mm. Each bit features multiple stepped sizes to enlarge, chamfer, or polish holes without switching tools.
• High-density diamond particles bonded to hardened steel core deliver exceptional wear resistance on hard materials. hardened steel core deliver exceptional wear resistance, outperforms standard carbide bitszz.
• Standard M10 thread fits 100mm angle grinders. Includes conversion rod for handheld drills. Maximum flexibility across different power tools.
• Works on concrete, tiles, marble, granite, quartzite, and microcrystalline stone. Ideal for kitchen, bathroom, and stone fabrication projects.
• Precision-ground tapered edge prevents cracking in tile and stone. Delivers clean, professional results every time.