DescriptionBosch Natural Stone Tile Set 4pcBosch Natural Stone Tile Bits are designed for decorative specialty tiles that feature natural stone and other harder materials. The bits provide a multigrind head with multiple edges. With these specially ground bit tips， the bits deliver 20 percent faster drilling in natural stone tile and other hard tile than standard glass and tile bits. Manufactured with high-quality carbide， these bits were constructed for natural stone tile， slate， granite and specialty tile. The 3/8 In. bits and above provide a three-flat shank for superior bit grip.FeaturesMultigrind head – designed with multiple cutting edges for harder tile materialsFast drilling in hard materials – delivers 20 percent faster drilling than glass and tile bitSpecialized carbide tip – centers for no-skate drilling and greater ease of useHigh-quality carbide material – provides longer life in hard materialsThree flat shank on 3/8 In. bits and above – offers outstanding bit grip to avoid slippageEngineered for use in natural stone tile， slate， granite and other specialty tile materials (specialty tiles that may be harder than normal tile)Not recommended for use on porcelain tilesAlso compatible with hammer drillsSpecificationsBrand NameBoschAssembled Weight (lbs)0.070000Bit MaterialCarbide TippedBit TypeSpecialtyCalifornia Proposition 65 Warning RequiredNoCountry of OriginChinaInternal Supplier Part #2608834765Manufacturer WarrantyProduct Defects OnlyPackage Contents4 Bits: (1) 1/8"， (1) 3/16"， (1) 1/4"， (1) 5/16"Package Depth1.92Package Height4.75Package Weight0.21Recommended Safety EquipmentEye， ear and dust protectionUPC000346475005Manuals Warranty - PDF