Milwaukee 49-56-0505 1/4" Hex Shank Diamond Abrasive One-Piece Hole Saw Power Drill Bit APPLICATION: Use this to drill holes through hard materials like tile, stone, or glass EJECTION SLOT: Easy plug removal is available via the onboard ejection slot, which lets you fit tools inside to take out chunks of tile clogging up your system DIAMOND PLUS: High grade diamonds provide superior durability for long term use on industrial jobsites COOLING: Run cold water on your job while drilling through with this bit to keep it cool to prevent potential warping HEX SHANK: This will fit in drill / drivers or hammer drills with a 1/4" chuck, offering you the chance to work with a variety of tools on a variety of surfaces