Diamond Tools/Tile core drill bits 

1. Outer diameter: 6mm - 200mm 
2. Grit: 30#40# 
3. Application: Glass, tile, granite, marble, and other stone 

Longer drilling life, better drilling effective 

Brazed Diamond Drill Bit can be operated without water, which improves working environment. 

It has the durability like Sintering tools, also the sharpness as electroplated tools. The life time is 2-3 times than electroplated one.