Diamond Max: Greater durability and toughness delivers up to 10X longer life, Higher Grade Diamonds and Improved Braze: Provide best-in-class performance, Large Slug Ejection Slot: Offers easy plug removal, Versatile: Ideal for cutting anchoring and clearance holes in all tile, stone and glass, Use on hard tile, stone like porcelain and granite, Heat resistant, Up to 10X longer life, 1/4" Hex Shank, Includes: (1) 1/4" Diamond MAX Hole Saw