Features Precision Drilling Made Easy: The Features: 1、Easy Drilling: The slot design of the drill bit tip enables high accuracy as well as quick drilling through material. 2、8Pcs in Total: Comes with 8pcs masonry drill bit in different sizes, so the cutting diameter varies form 5mm to 12mm. 3、Reliable Work: Widened spiral flute has improved the chip removal, while the 6.35mm hex shank can prevent slipping. 4、Practical Use: Allows for wide application on tile, concrete, brick wall, glass, mirror, plastic masonry, wood, etc. 5、Good Material: Made of cemented carbide, proof and not easy to crack, very for long term use. Specification: Item Type: Masonry Drill Bit Material: Cemented Carbide Colour: Black Shank Diameter: Approx. 6.35mm / 0.25in Cutting Diameter: Approx. 5 ~ 12mm / 0.2 ~ 0.47in Application: Multi purpose drill bit for tile, concrete, brick wall, glass, mirrors, plastic masonry and wood. Package List: 8 x Masonry Drill Bit Note: Although the alloy tip has high hardness, please do lubricate it with water when drilling hard materials such as glass, porcelain floor tiles, marble or granite. Package List 8 x Masonry Drill Bit