Feature: 1. Great workmanship, made by diamond hot pressing and sintering process, the cutter head is firm, wear‑resistant and durable without any defect. 2. The drill bit has a long service life, a sharping edge and a fast drilling speed. 3. Suitable for drilling holes on BSP1/2in angle grinders, suitable for drilling holes in ceramics, granite, quartz stone and other materials 4. Can improve work efficiency, large chip removal port design, can smoothly chip removal during drilling. 5. Convenient to use and with good performance, with small size, easy to carry and store. Specification: Item Type: Diamond Hole Saw Drill Bit Material: Diamond Production Process: Sintering Color: Blue Drilling Diameter: Approx. 6mm / 0.2in 8mm / 0.3in 10mm / 0.4in Total Length: Approx. 98mm / 3.9in Thread: BSP1/2in Applicable Machine: Angle grinder Package List: 1 x Diamond Hole Saw Drill Bit