[High Quality Material] Made of hard alloy, this glass drill bit has very good abrasion resistance and extreme hardness for long service life. Titanium coated surface is anti-oxidation and does not fade.[7 Sizes] Glass drill bit with 7 different sizes: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, all in the 1/4 hex shank, perfect for various tasks, this drill bit is marked at the waist[Precise and Smooth Hole] Excellent for drilling clean and precise holes in glass and tiles. The edge of the drill bit is fine, and the hole is smooth and full, without leaving any burrs[Robust & Durable] Hex shank glass drilling tools are sharp and change quickly. The use of water lubrication will significantly extend the life of the bit[Wide Application] Indispensable for DIY and home improvement enthusiasts in glass tile ceramic mirrors and other hard and brittle work surfacesProduct Feature:Take carbide tool.Drilling is smooth and complete, it will not produce shock phenomenon, easy to positionSmall cut resistance, can improve working speed and ease of use.Use for tiles, mirrors and glass.drill bits are specially designed for glass, ceramics, tiles and any other hard and fragile work surface, suitable for precise center drilling, they will not break porcelainWarning:To improve the lifespan of Tile; Glass Drill, it is better to add coolant, such as water, kerosene or turpentine while drilling. Low speed and low glass pressure