Specification Brand : DT-DIATOOL BulletPoint1 : 【Specification】6/8/10/20/25/28/32/35/45/50/65mm core drill bit with triangle shank, totally 11pcs. Diameter 6-65mm: total length 65mm, diamond height 10mm. Grit #50/60. BulletPoint2 : 【Application】Dry or wet drilling holes in porcelain tile, ceramic, marble, quartz, granite, masonry, etc. Not recommend for drilling glass and wood. BulletPoint3 : 【Recommended Machine】Hand drill, bench drill. General hand drill speed is 2000RPM-5000RPM. Ensure that the drilling speed is not less than 2000 RPM. The higher the speed, the longer the work life. Don't use the impact or hammer mode. BulletPoint4 : 【Durable and Sturdy】Vacuum brazing processing technology make diamonds are more exposed; So that core drill bits are sharper and improve work efficiency. The average service life of vacuum brazed drill bits is 3-5 times that of electroplated tools. BulletPoint5 : 【Good Effect】: U-Grooves Design helps chip removal and improve the working efficiency of hole drilling. #40 sharp diamond, less debris and edge breakage on materials and better finishing effect. Color : Red CompatibleMaterial1 : Stainless Steel CompatibleMaterial2 : Metal CompatibleMaterial3 : Wood CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier : 7332396094305 ExternallyAssignedProductIdentifier1 : 759039779134 ExternallyAssignedProductIdentifier2 : 0759039779134 ExternallyAssignedProductIdentifier3 : 00045242199952 FinishType : Diamond GpsrSafetyAttestation : 1 IncludedComponents : mount-adapters ItemDisplayDimensions_Height : 1 inches ItemDisplayDimensions_Length : 1 inches ItemDisplayDimensions_Width : 1 inches ItemDisplayWeight : 1 pounds ItemName : DT-DIATOOL Diamond Core Drill Bits Set - 11pcs (6/8/10/20/25/28/32/35/45/50/65mm) Hole Saws Kit with Triangle Shank for Porcelain Tile Ceramic Granite Marble ItemPackageDimensions_Height : 10 centimeters ItemPackageDimensions_Length : 21.5 centimeters ItemPackageDimensions_Width : 18.5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : hole-saws Manufacturer : DT-DIATOOL Material : Diamond ModelNumber : 759039779134 NumberOfFlutes : 2 NumberOfItems : 11 NumberOfPieces : 11 PartNumber : DT9716510K5T ProductDescription : Product Name: DT-DIATOOL 11pcs (6/8/10/20/25/28/32/35/45/50/65mm) Hole Saw Kit with Triangle Shank for Porcelain Tile Ceramic Granite Marble