A unique product that requires no guiding, minimal coolant, and fast easy waste ejection, which allows for continuous multiple hole cutting. • High grade exposed diamond for fast smooth cutting. • No drill guide required. • Excellent performance on cordless and corded drills (1500 - 2000rpm). • Suitable for very hard tiles, porcelain, ceramic, granite, marble, glass, slate and stone. WETDRY 8mm Diamond Porcelain Drill Bit