1、Blade add good‑quality diamond particles, which is of sharpness but not easy to be damaged 2、Straight shank design, suitable for most hand electric drills on the market, with a wide range of applications 3、Large chip removal port design bring convenient chip removal, safe and non‑splashing 4、Used for drilling marble, granite, concrete, artificial stone, pebbles and other materials 5、The product is covered with red coating, which is corrosion‑resistant and moisture‑resistant Item Type: Diamond Drill Bit Material: High speed steel, diamond Application: Drilling marble, granite, concrete, artificial stone, pebbles and other materials; widely used in home improvement, DIY hand-made and other scenes Equipment: Electric drill, bench drill Hole Diameter: Approx. 18mm / 0.7inTotal Length: Approx. 83mm / 3.3in Shank Type: Straight shank Color: Red 1 x Diamond Drill Bit