Specification Brand : HARFINGTON BulletPoint1 : Size - Drilling diameter: 24mm / 0.94"; drilling depth: 30mm / 1.18"; round shank diameter: 8mm / 0.31"; total length: 51mm / 2.01" BulletPoint2 : Material - Using electroplated diamond (50-60 grits), the opener creates precise, smooth cuts with no broken edges. Nickel plating improves hardness, wear resistance, corrosion resistance, and greatly extends the drill bit life. BulletPoint3 : Features - The serrated drill bit increases the sharpness and opening speed. Sharper and more durable than ordinary electroplated drill bits, especially suitable for thick glass openings. (10mm thick glass generally has about 300 openings.) BulletPoint4 : Applications - Widely used for cutting accurate holes on glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, light stone and fiberglass. Not suitable for drilling tempered glass, plastic and wood. Use on ordinary hand drills or bench drills. BulletPoint5 : Notice - Always work with coolant (water) when drilling. Start your hole diagonally, make a round trace and then hold drill straight. Use at low drill speeds and drill pressure. Not suited for use on concrete or for depths beyond about 1/2". Color : Silver CompatibleMaterial : Quartz, Granite, Marble, Porcelain, Ceramics, Tiles, Glass, Clay, Stucco, Stoneware CompatibleMaterial1 : Glass CompatibleMaterial2 : Porcelain CompatibleMaterial3 : Ceramic CompatibleMaterial4 : Marble CuttingAngleString : 45.0 degrees ExternallyAssignedProductIdentifier1 : 850004328545 ExternallyAssignedProductIdentifier2 : 0850004328545 ExternallyAssignedProductIdentifier3 : 40028877586647 FinishType : Nickel GpsrSafetyAttestation : 1 IncludedComponents : inc ItemName : HARFINGTON Diamond Drill Bits 24mm Serrated Hollow Core Hole Saw for Glass Ceramic Porcelain Tile Marble Stone ItemPackageDimensions_Height : 11.5 centimeters ItemPackageDimensions_Length : 3.5 centimeters ItemPackageDimensions_Width : 6.6 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : hole-saw-sets Manufacturer : HARFINGTON Material : Coated Steel Material1 : Diamond Material2 : Carbon Steel Material3 : Blend Material4 : Blend Material5 : Blend ModelName : LXAH47SET ModelNumber : hta220803hh0684 NumberOfBoxes : 1 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 1 PackageLevel : unit PartNumber : hta220803hh0684 Pattern : Solid PowerSourceType : hand_powered ProductDescription : The serrated drill bit increases the sharpness and opening speed. Sharper and more durable than ordinary electroplated drill bits, especially suitable for thick glass openings. (10mm thick glass generally has about 300 openings.) Using electroplated diamond (50-60 grits), the opener creates precise, smooth cuts with no broken edges. Nickel plating improves hardness, wear resistance, corrosion resistance, and greatly extends the drill bit life. Low drilling resistance, continuous cutting edges, high precision, little or no chipping. Widely used for cutting accurate holes on glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, light stone and fiberglass. Not suitable for drilling tempered glass, plastic and wood. Use on ordinary hand drills or bench drills. Always work with coolant (water) when drilling. Not suited for use on concrete or for depths beyond about 1/2". Notice: Start your hole diagonally, make a round trace and then hold drill straight. Use at low drill speeds and drill pressure.