Welcome To Our Store. Dry Diamond Core Hole Drill Bits 5/6/8/10/16mm For Granite Tile Ceramics Marble. Product Name: Drill Bit? Materials: Diamond? Color: Black? Diameter: 516mm? Length: 2949.5mm. These Hole Openers Are Made Of High Quality Diamond With Extremely High Hardness And Excellent Wear Resistance, Which Can Withstand The Huge Friction And Pressure Generated When Opening Holes In Hard Materials Such As Marble, Ensuring That The Tools Are Not Easily Damaged During Long Time Use And Prolonging The Service Life. The Hexagonal Shank Design Effectively Prevents The Drill Bit From Sliding, Making The Drilling Process More Labour-Saving And Improving Work Efficiency. It Is Not Only Suitable For Drilling Operations On Marble Materials, But Also On Tiles, Glass And Many Other Materials With High Hardness. This Wide Applicability Makes It Play An Important Role In Many Fields Such As Building Decoration And Furniture Manufacturing. This Hole Opener Is Widely Used For Drilling Holes In Construction And Renovation Works, Furniture Making Industry And Decoration Works Such As Marble, Tiles And Other Materials. With Its Excellent Material, Diversified Specifications, Unique Design And Wide Applicability, It Has Become An Indispensable Tool For Opening Holes In Many Fields, Such As Building And Decoration, Furniture Manufacturing, Industrial Production, Etc. It Provides An Efficient And Reliable Solution For All Kinds Of Hard Material Opening Operations. Ide range of this month’s promotions Shop now. We Pride Ourselves On Offering Quality And Reliable Products. You Will Enjoy A Fast, Efficient And Friendly Service As Well As Great Prices On A Wide Range Of Products. All Products Are Brand New And Sealed. With A Wide Range Of Items To Choose From, Please Feel Free To Select The Product That Meets Your Needs. All products in our store are elaborately made. We care about our valued buyers, if you have any questions, our Customer Service staff will be very glad to help you. We try our best to reply to your emails as soon as possible, however, due to the high volume of daily incoming emails and time zone difference, we may not be able to reply to your emails immediately. Please contact me before you return it. Feedback is very important to us. For the functional products in our shop, we make sure that the functions are the same as the description. About the product colour:Because of the different light and environment when the product is photographed, In a few instances the colour of the product may have a little colour difference with the actual colour of the product, I hope you can understand.