Vacuum Brazed Diamond Technology: This drill bit outperforms electroplated diamond bits in load capacity and wear resistance, supporting quicker cutting and delivering excellent durability and structural stability. Superior Drilling Performance: The dual-side chip evacuation holes effectively discharge stone debris during operation, greatly boosting drilling efficiency. Wide Compatibility: Ideal for drilling granite, marble, porcelain tiles, ceramic, masonry, concrete, quartzite, natural stone and hard floor tiles with consistent clean results. Dry Drilling Convenience: Eliminates the trouble of wet drilling. This Vearter diamond core bit works perfectly for dry cutting without water or additional coolant. Operation Guidance: Start drilling at a 45° angle, slowly shift to 90° while moving the bit slightly side to side. Do not apply heavy downward pressure, which may cause diamond grains to detach and damage the bit.