Diamond Beveling Chamfer Bits, 3 1 4” Diamond Countersink Bit with 5 8” 11 Thread for Enlarging Shaping Trimming Cleaning Existing Holes of Porcelain Granite Marble Ceramic (82mm) 3 1 4”(82mm) Size:3 1 4”(82mm) wild blueberry extracts have been B0CLSCCPTF wild blueberry extracts have been shown to encourage a healthy inflammatory response and to have powerful antioxidant properties High quality non slip concave buffer handle design is more comfortable and safer to use [High Quality Raw Material]: The bit is made of heavy coated premium diamond with vacuum brazed technology that will provide a fast cut rate and ensures more effective cleaning and trimming with no hassle Workable Width 49mm