Coolnut Diamond Beveling Chamfer Bit - 3-1/4"(82mm) Countersink Drill Bit for Enlarging, Shaping, and Trimming Existing Holes in Tile, Porcelain, Ceramic with 5/8''-11 Thread

[Size]Diameter 3-1/4"(82mm); 5/8''-11 Thread; Total length 60mm; Working length 49mm; Diamond Grit #80/100; Top angle: 60 degrees [Application]Engineered for shaping, enlarging, and beveling existing holes in Tile, Porcelain, Hard Ceramic. Facilitates creating round indentations for pipes or electrical wiring [Feature] construction with high-quality diamond and vacuum brazing technology ensures longevity [Save Tools]With a single standard diamond core drill and a beveling chamfer bit, produce various hole sizes (0-3-1/4"), reducing the for multiple core bits [Attention]Not for drilling new holes but for enlarging, shaping, and trimming existing ones. Fits 5/8"-11 thread angle grinders, easy to use with or without water. Recommended speed 6000RPM, max 11000RPM. For electric drills, use an SDS or other adapter