Features 1、[DIAMOND SINTERING] Use excellent diamond material to improve the sharpness and wear resistance of the hole opener. 2、[HIGH EFFICIENCY] The head of the hole opener is incisive, the drilling speed is fast, and the work efficiency is improved. 3、[M14 THREAD] With standard M14 female thread, can be installed on standard drilling tools to use. 4、[DRILLING MATERIALS] Suitable for drilling holes of granite, ceramic tiles, concrete, marble and other materials. 5、[FAST CHIP REMOVAL] Large displacement cutting design, fast chip removal and not easy to block, with simple operation. Specification Item Type: Diamond Drill Bit Color: Blue Total Length: Approx. 68mm / 2.7in Female Thread: M14 Application: Marble, granite and other stone drilling Package List 1 x Diamond Drill Bit