Vacuum Brazed Diamond Technology – More Heavy Duty and Wear Resistant than electroplated diamond bits, providing faster cutting speed, durability, and sturdiness. Superior Performance – Experience efficient drilling with specially designed drill bit that features holes on both sides for fast removal of stone chips, resulting in more efficient drilling. Wide Application – Our core bit is specially engineered to provide outstanding drilling results in granite, marble, porcelain stoneware, tiles, ceramics, masonry, concrete, quartzite, natural stone tiles, and hard floor tiles. Dry Drilling Efficiency – Say goodbye to messy and time-consuming wet drilling. Vearter Diamond Drill Bit is specifically designed for dry drilling, allowing you to work efficiently without the need for water or any other coolant. Operating Hint – To achieve optimal results, set the drill at a 45-degree angle, then gradually adjust it back to a right angle while gently nudging it left and right. Do not press the drill down firmly or the diamond will fall out and damage the opener.