Driak 5pcs Tungsten Carbide Titanium Coated Glass and Tile Drill Bits Set for

Specifications Material:Tungsten Carbide Surface Treatment: Titanium Coated size:3mm/4mm/6mm/8mm/10mm Hex Shank Diameter: Approx. 6.35mm (1/4 inch hexagonal shank) Package Included: 5 * Glass Drill Use for Ceramic Tiles Mirror and Glass Once through the tile or mirror this drill bit will cope easily with any Masonry behind it Ideal for drilling fastner holes in bathroom tiles or wall mirrors Titanium coated for durable and longer life Spear pointed design reduces breakout Note 1.If using on Floor tiles regularly lubricate the bit with water to keep it cool and working to its best. 2.To improve the service life it is better to add some cooling liquid such as water kerosene or turpentine while drilling.