Specification Brand : SHDIATOOL BulletPoint1 : 2pcs 5/16 INCH Welded Diamond Drilling Core Bits (Wet) BulletPoint2 : Diameter:8MM Total length: 75MM Thread: 5/8-11 BulletPoint3 : Designed for drilling hard granite, marble, engineering stone, concrete, brick BulletPoint4 : Wet drilling BulletPoint5 : If the value of your order is more than $100 in our store, we'd like to send it to you by free UPS from China. Attention: Only for American order BulletPoint6 : Thin wall BulletPoint7 : Use with SDS core bit shank 48-03-3555 (8 in.) or 48-03-3561 (12 in.) Color : Black ExternallyAssignedProductIdentifier1 : 0718760495348 ExternallyAssignedProductIdentifier2 : 718760495348 ExternallyAssignedProductIdentifier3 : 00045242105304 FinishType : Polishing GpsrSafetyAttestation : 1 IncludedComponents : Unit^Instruction Guide ItemDisplayDimensions_Height : 8 inches ItemDisplayDimensions_Length : 3 inches ItemDisplayDimensions_Width : 3 inches ItemName : SHDIATOOL 5/16 Inch Laser Welded Diamond Wet Drill Core Bits Dia 8mm with 5/8-Inch-11 Thread for Hard Granite Marble Concrete(2-Pack) ItemPackageDimensions_Height : 9.6 centimeters ItemPackageDimensions_Length : 2.6 centimeters ItemPackageDimensions_Width : 7.2 centimeters ItemPackageQuantity : 2 ItemTypeKeyword : core-drill-bits Manufacturer : SHANGHAI DIATOOL CO., LTD. Material : Artificial diamond and Steel body ModelNumber : CU5511Z3102HF NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 8 PartNumber : CU5511Z3102HF ProductDescription : ============= Description of Products =============== Item:Welded Diamond Drilling Core Bits (Wet) Quantity: 2pcs Specification: Diameter: 8MM Total length: 75MM, Thread: 5/8-11(Make sure it can be installed on your machine) Application: Drilling hard granite marble all mature stone concrete Feature: SUPREME Grade and Special bond matrix extends drilling life and improve the working efficiency Ideal for drilling the faucet mounting holes in stone countertops, plumbing lines in showers and vanities Wet drilling Recomended speed 3000- 6000 RPM,Maximum speed for the bits are 4500 RPM ================THE END================ Other available diameter: 6mm, 8mm, 10mm, 12mm, 14mm, 18mm, 20mm, 25mm, 32mm, 35mm, 38mm, 45mm, 50mm, 58mm, 65mm Note: These products are marked with our brand. If you do not want our brand name, please leave us message, we could send you products without brand. Customize service: If you order 20pcs we could mark your brand name on our products