6 Pcs Diamond Drill Bits Set, 1/4 5/6 3/8 1/2 Inch Brazed Diamond Drill Bits for Precision Drilling in Tile Ceramic Glass Granite Marble Masonry

About the product (from the store page)

Clean, Precise Holes inHard Surfaces Drill through tile, glass, granite, marble and other hard materials with greater control, cleaner edges and less frustrating bit slippage. Hard Surfaces Should Not Mean Rough Results Standard drill bits can slide across smooth tile, struggle to cut hard stone and leave cracked or uneven edges. These diamond drill bits are designed to create a more stable starting groove and a cleaner, controlled opening. More Convenient Installation Dry Drilling Made Easier Complete common tile and stone installation projects without setting up a continuous water feed. Use light pressure and pause periodically during longer drilling sessions to control heat. Premium Materials, Built to Perform Every part is designed to support more stable drilling—from the diamond-coated cutting edge to the anti-slip hexagonal shank. Works With Common Drilling Equipment The secu…