This diamond countersink drill bits is designed for Bevelling,Enlarging, Grinding and Polishing the exsit holes or shaping edge of materials.
HIGH-GRADE DIAMOND: High quality dimoand grain make the edge of the hole smooth and clean, and can achieve excellent surface effect.
The chamfer effectively eliminate the rough holes of ceramics, tiles porcelain marble and other materials. ATTENTION: This i
40-50 Diamond Grit for grinding CONCRETE/MASONRY/GRANITE/MARBLE/BRICK...
Strong steel body provide stable cutting performance and good finishing on the Lower cost to save your money