... diamond core drill, carbide glass bit , diamond engraving bits for CNC engraving machine and CNC router, glass etc. Excellent ... and cleared. Please let us know if you are looking for other accessories or hardware. When you have any queries ... -43431160DCD-50501160DCD-60601160 1. Applicable material : Professional engraving tools for hard materials, such as stone, granite, gravestone , ceramic tiles ...