ITEM NAME:10pcs Titanium Ceramic Glass Drill Bit Tungsten Carbide Cross Spear Head Dr O4H9 10pcs Titanium Ceramic Glass Drill Bit Tungsten Car.Head type: cross spear head. 10pcs x Glass Drill. Bit type: tile & glass drill. When drilling the hole,your force should be slow, especially at the beginning of drilling and when it is drilling the glass through.
