Specification Brand : HARFINGTON BulletPoint1 : Size - Drilling Diameter: 11mm / 7/16"; Shank Diameter: 6.6mm / 0.26"; Total Length: 50mm / 1.97"; Package Content: 5pcs Diamond Drill Bits (Comes with Packaging Box). BulletPoint2 : Material - The head material of this glass drill bit is diamond, which has very high hardness and can easily cut various materials; and the excellent wear resistance makes the diamond hole saw have a long service life; at the same time, diamond shows good stability during the cutting process, can provide smooth and precise cutting, thereby achieving better cutting quality and accuracy; the drill body is forged from carbon steel and is not easy to deform, helping you to open holes easily. BulletPoint3 : Feature - Our diamond tile coring drill bits have a thicker diamond coating that makes the groove edges sharper, making it easy to make high-precision cuts on smooth surfaces without cracking. The side of the drill bit is designed with a large chip removal hole to ensure that the drilling tool can effectively remove waste materials during cutting and ensure continued smooth work. BulletPoint4 : Application - This universal hole saw tool is suitable for most electric drills on the market, so you can use it to drill holes in glass, tile, marble, ceramic, porcelain, fiberglass, slate, or lightweight stone, meet most drilling needs in your work or daily life. BulletPoint5 : Note - According to the material to be cut and the work requirements, please choose the appropriate rotation speed, maintain a stable hand grip and smooth cutting force, and avoid excessive pressure to avoid damage or jamming of the tool; in addition, for some continuous drilling operations that require a long time for the job, Please use appropriate coolant or lubricant to help reduce temperatures and extend tool life. Color : Silver Color1 : Silver Color2 : Black CompatibleMaterial : Porcelain, Ceramic, Granite, Masonry CompatibleMaterial1 : Ceramic CompatibleMaterial2 : Porcelain CompatibleMaterial3 : Marble CompatibleMaterial4 : Cast Iron CompatibleMaterial5 : Foam CompatibleMaterial6 : Aluminum ExternallyAssignedProductIdentifier1 : 008925163978 ExternallyAssignedProductIdentifier2 : 0008925163978 ExternallyAssignedProductIdentifier3 : 00662850142363 ExternallyAssignedProductIdentifier4 : 0840145829506 ExternallyAssignedProductIdentifier5 : 00840145815950 GpsrSafetyAttestation : 1 IncludedComponents : Freud-Diablo DB 1-3/8 Diamond GRIT Hole Saw ItemName : HARFINGTON 5pcs Diamond Drill Bit Hole Saw 7/16"(11mm) Tile Core Cutting Drilling Tool for Glass Ceramic Marble Porcelain Tile Quartz Gemstone Aquariums ItemPackageDimensions_Height : 0.59 inches ItemPackageDimensions_Length : 3.54 inches ItemPackageDimensions_Width : 2.36 inches ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : hole-saws Manufacturer : HARFINGTON Material : Carbon Steel ModelName : Freud-Diablo DB 1-3/8 Diamond GRIT Hole Saw ModelNumber : DHS1375DG NumberOfItems : 5 NumberOfTeeth : 10 PackageLevel : unit PartNumber : htf240508hh000692 Pattern : Solid ProductDescription : The head material of this glass drill bit is diamond, which has very high hardness and can easily cut various materials to improve work efficiency; and the excellent wear resistance makes the diamond hole saw have a long service life; at the same time, diamond shows good stability during the cutting process, can provide smooth and precise cutting, thereby achieving better cutting quality and accuracy; the drill body is forged from carbon steel and is not easy to deform, helping you to open holes easily. Our diamond tile coring drill bits have a thicker diamond coating that makes the groove edges sharper, making it easy to make high-precision cuts on smooth surfaces without cracking. The side of the drill bit is designed with a large chip removal hole to ensure that the drilling tool can effectively remove waste materials during cutting and ensure continued smooth work. This universal hole saw tool is suitable for most electric drills on the market, so you can use it to drill holes in glass, tile, marble, ceramic, porcelain, fiberglass, slate, or lightweight stone, meet most drilling needs in your work or daily life. The operation is simple and does not require other special guidance tools. First, use a tile hole opener equipped with a positioning drill bit to locate the hole. After positioning, remove the positioning drill bit, and then directly use the tile hole opener to open the hole. According to the material to be cut and the work requirements, please choose the appropriate rotation speed, maintain a stable hand grip and smooth cutting force, and avoid excessive pressure to avoid damage or jamming of the tool; in addition, for some continuous drilling operations that require a long time for the job, Please use appropriate coolant or lubricant to help reduce temperatures and extend tool life.