Versatile Sizing: This step drill bit set includes 20mm, 35mm, and 50mm sizes, making it ideal for various hole sizes. Works as a tile reaming drill bit or diamond step chamfer drill bit for diverse materials Robust Construction: The diamond brazed step drill bit and multi layer tapered reamer feature premium-grade materials for enhanced strength, wear resistance, and long-term reliability in tough drilling tasks Efficient & Precise Cutting: Whether using a 20-35-50mm multilayered cone reamer or step drill bit, the design ensures smooth, clean cuts with no jagged edges, ideal for both woodworking and tiling projects User-Friendly & Adaptable: Compatible with 14mm threaded angle grinders or handheld drills, the diamond step chamfer drill bit and multilayered cone reamer support both wet and dry drilling with ease Wide Application: Perfect for use on tiles, stone, marble, and metal, these diamond step drill bits and multi-layered cone reamers suit construction, renovation, and DIY work with professional results Diamond Step Chamfer Drill Bit, Diamond Brazed Step Drill Bit, Multi Layer Tapered Reamer, 20-35-50mm Multilayered Cone Reamer, for Metal, Wood, Concrete, Tile, Marble, Engineered Stone