• High Quality
• Good Performance and long life
• Excellent for making clean and accurate hole on glass and tile
• Works better with a electric drill
• These Diamond Bits are Capable of Drilling into Extremely Thick Glass.
• Use a Low Speed Setting and Proper Cooling, Such as Water or Silicone Oil, to Ensure Longer Lasting Life.

Size: 40mm 

Superior Performance :

Cut Holes in Thin to Thick Glass