[High Quality Material] Made of hard alloy, this glass drill bit has very good abrasion resistance and extreme hardness for longer life, titanium coated surface is anti-oxidation and will not fade [Size] 6mm Spear-pointed Tip, 1/4 inches design reduces breakout. Length: 72mm, Shank: approx. 3/16 inches [Precise & Smooth Hole] Excellent for clean and accurate hole drilling in glass and tile. Fine drill edge and the hole is smooth and complete, without leaving burrs [Sturdy & Durable] Round shank glass drilling tools are sharp and quick change. Use water lubrication will extend drill bit service life considerably [Wide Application] Essential for DIY and home improvement lovers to Drill Glass Tile Ceramic Mirrors and other hard and brittle work surface