Diamond Roller Saw Ceramic Tile Slate Glass Porcelain Marble Drill Bits 60mm Description: Mainly used do drilling porcelain tiles, ceramic tiles, marble, granite, reinforcement concrete and other hard materials. Gold paint on the body of this bit to avoid rusting. Opening neat, smooth, no broken edges, no shaking phenomenon, easy to chip Low incision resistance, stable drilling, high speed, no breaking the border. Suitable do drilling tap mounting holes in stone countertops, plumbing lines in showers and vanity. Specifications: How to use: Use wet or dry To extend its service life, use water do cooling and lubrication. Can be used with table drill, manual electric drill. When you use a manual electric drill, start slowly, at a 45 degree angle, go vertically After making the initial mark. Material: Diamond Color: Gold Size: ok. 6-100mm or 0.24-3.94 inch The package includes: 1 sztuka drill bits