Why you need this glass hole cutter Cuts cleaner and lasts longer: electroplated Diamantine grit coating delivers roughly 2x the life of standard bits, so you replace bits less often and keep projects moving. Consistent, smooth drilling: uniform cutting edges help discharge debris and reduce catching, giving steadier performance in brittle materials like glass, marble, and tile. Accurate, repeatable holes: an efficient centering drill design ensures high concentricity for precise positioning and faster deep drilling. Key features and benefits Diamantine grit electroplated coating — extended durability and consistent cutting performance. Uniform cutting edges — improved debris evacuation for smoother operation and reduced heat build-up. Centering pilot design — high concentricity for accurate hole placement and reduced chipping. Universal shank — fits standard electric drills and most drill chucks for easy compatibility. Water lubrication recommended — maintain optimal performance and extend tool life by applying water during use. What it does for you Makes clean, accurate holes in glass, marble, and ceramic tile without frequent replacements. Simplifies both one-off DIY jobs and repeated professional installations with reliable centering and longer bit life. Works with standard electric drills so you don’t need specialized equipment. Typical use scenarios Bathroom renovation: drilling faucet, sink, or shower holes in glass panels and tile while minimizing chipping. Stone countertop installation: creating precise openings in marble for sink and fixture fittings. Tile and glass fixture work: cutting holes in ceramic tile or glass panels for accessories, trim pieces, or plumbing passthroughs. Practical tips Use continuous water lubrication while drilling to reduce heat and preserve the coating. Fit the bit into a standard electric drill chuck; maintain steady, moderate pressure and allow the bit to do the cutting. This Diamantine-coated glass hole cutter is designed for dependable, precise hole opening in glass, marble, and tile, offering extended lifespan, improved debris evacuation, and easy compatibility with standard electric drills.