Diamond frez with round bevel and round bevel do marble ceramic porcelain, small Description: [ Material]: The beveled diamond drill bit is made of emery material, which ma high strength, high hardness, durability and long service life. [Features]: Diamond phase ma extended thread interface, which is wear-resistant, more convenient and durable, and ma extended hole opening function. The bevel can reduce chamfering pressure, make it easier to enlarge the bevel, and polish existing holes. [Function]: Diamond do chamfering drill is suitable do multiple scenes, opening, zooming, chamfering, polishing, etc. in marble, ceramics, etc. Extended threaded interface is more durable and stable. [No need to add water]: Diamond frez conical ma built-in cooling, so no ma need to add water, it can be used directly, making opening holes more convenient. [Matching model]: Diamond frez do chamfering is often installed on an angle grinder type 100 or an electric hand drill. Size Chart: Small: 4,5 cm x 3,8 cm / 1,77 inch x 1,50 inch Large: 5,5 cm x 5 cm / 2,17 inch x 1,97 inch The package includes: 1-piece diamond bit do fingers