Upgrade your drilling efficiency with our Diamond Cone Step Drill Bit, engineered for durability, precision, and versatility. Designed with a multi-layer tapered structure and industrial-grade diamond coating, this reamer drill bit provides smooth hole expansion and clean chamfered finishes on a wide range of materials—including concrete, tile, marble, engineered stone, and metal. With three standard cutting sizes (20mm, 35mm, 50mm), this step cone drill bit is perfect for hole enlarging, beveling, and reaming. The 14mm threaded shank fits most 100-type angle grinders, and a converter allows for use with handheld drills, making it ideal for both professionals and DIY users. Whether you're working on construction projects, tile installations, or metalwork, this tool delivers high performance with every use. Compatible with wet and dry drilling environments, it offers consistent results while minimizing wear, heat, and downtime. Add this multi-step diamond reamer to your toolkit and experience precise, efficient drilling like never before.