Easy to Use: Diamond beveling chamfer bit, is used for enlarging, polishing, shaping, and trimming existing holes, easy to useHigh Efficiency: Trapezoid chamfer bit with different diameters, can expand different hole sizes, satisfying different needsPremium Material: The tile bit is made of premium emery material, high strength, is wear resistant, sturdy and ensures a long time to useEasy Installation: M14 threaded diamond beveling chamfer bit, can be installed directly on angle grinder. And it can also be used for hand drill by adding an adapter rod (NOT included)Wide Applications: The diamond countersink drill bit is suitable for granite, marble, porcelain tiles, concrete, ceramic and other material Specification: Material: Emery Size Chart: diameter 2-4.8 cm/0.79-1.89 inch, width x height 4.8 cm x 3.6 cm/1.89 inch x 1.42 inch Package Includes: 1 Piece Diamond Beveling Chamfer Bit Note: Please allow slightly errors 1-2cm differences due to manual measurement.