Size & Specifications: Includes 1 2 inch (50mm) diamond chamfer drill bit with 60 degree top angle, 46mm depth, #80 grit. Wide Application: Ideal for modifying and finishing holes in tile, porcelain, and marble. Enhance edge finishing, reduce the risk of tile cracking under tension, and relieve stress in glass, ceramic and porcelain tiles. Cost-effective Solution: Get professional results using only one standard diamond drill bit and one diamond chamfer tapered tile drill bit. This set creates hole sizes from 0-50mm efficiently and economically. Directions for Use: Designed for beveling and reinforcing hole edges, not for drilling new holes. Best performance at 6000rpm, maximum speed 11000rpm. Ensures clean and reinforced edges, especially when edges are chipped or need cleaning. Versatile Tool: Not only is this set used for enlarging and shaping, it is also great for finishing existing holes. It's a must-have tool for any professional working with stone, glass or ceramic materials, ensuring precise, clean results. Colour:As Shown Material:steel Package Contents: 1 * 50mm Chamfer drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.