General description These 4 Pcs Diamond Drill Bits are designed specifically for drilling ceramic tiles, marble, and concrete. They feature a hex shank for secure attachment and come in sizes of 6mm, 8mm, 10mm, and 12mm, making them versatile for various drilling needs. Technical specifications Material: Diamond Sizes: 6mm, 8mm, 10mm, 12mm Colour: Black Measurement allowed error: +/- 1-3cm Installation Do not use these drill bits with hammer mode. Only fit these drill bits on a cord drill, not cordless drill (not enough power). Usage Only for tile drilling; not recommended for the material behind the tile. For horizontal drilling, apply gentle pressure. For vertical drilling, the weight of the machine will provide sufficient pressure. Other information