QEP's 5/16" Diamond Hole Saw for grinders is up to 50% faster and lasts up to 12X longer than standard diamond drill bits. It is designed for easy, fast and accurate cutting of porcelain, ceramic and glass tiles. It features a special diamond grit edge for faster and smoother cuts, and does not require water cooling.

• Designed for fast and accurate cutting of porcelain, ceramic and glass tiles
• For use with grinders, ideal for cutting 5/16" holes
• Does not require water flow for cooling
• Features superior diamond grit edge for faster and smoother cuts
• Up to 12X longer life than standard hole saws, up to 50% faster than a drill
• Grinder must be used at Full Power for groove at 5° to 30°
• Recommended RPM is 8000-12000 for light pressure at 90°