tileLife® Drills 30-70 holes in grade 5 porcelain tiles. Self-cooling and self-sharpening. Optimum speed 2000-3000rpm. With wax coolant system that absorbs the heat, melts and begins lubrication process, improves tool life and speed of drilling.Self-CoolingSelf-SharpeningFast Drilling SpeedUse on Full Speed for Best Results & Longer Life