Masonry drill bitsIndustrial quality tungsten carbide drill bits for piercing concrete, stone, brick, ceramic, granite, marble, etc.For use in rotation and percussion.Recommended for intensive use and very hard materials.4 sharpened faces.Tivoly guaranteed quality drill bits.WarningTungsten carbide is a very hard and frangible material, to minimise the risk of accidental injury, it is recommended to wear safety goggles (see Individual Protection Equipment section).