Specification Brand : XIANFENGHU BulletPoint1 : [Size]: This Diamond Core Drill Bits Set Total have 5 pieces,3/16” (5mm) 1/4” (6mm), 5/16” (8mm), 3/8” (10mm), dry diamond drill bits; 1/4” (6mm) four-edged carbide hammer drill bit uses YG6X cemented carbohydrate material blade drill bit to deliver faster drilling into masonry materials and longer life in concrete; Connection: with 1/4” Hex Shank. BulletPoint2 : [Vacuum Brazed Technology]: This Vacuum Brazed Hole Saw use Vacuum brazing diamond technology offers very high efficiency. High grade diamond grit for easy cutting and increased durability in demanding applications. High quality core steel body, more efficient and durable, not easy to deformation. BulletPoint3 : [Support Dry Drill Holes]: The Diamond Hole Saw inside of the drill is filled with cooling wax, which does not need to add water and supports dry drilling. When used, wax helps dissipate heat and remove chips, extending the service life of the drill. BulletPoint4 : [Widely Used]: Diamond core drill bits are worked great for dry drilling holes through porcelain tile, marble, bathroom tile, granite, ceramics, masonry, stone, glass, brick with ease. (Please note not suited for wood material) BulletPoint5 : [Fit Most Tools]: Dry Diamond Core Drill Bit can be used on Corded Drill, Cordless Drill, Bench top Drill, convenient for use. BulletPoint6 : [Update design]: U type slot design with fast drilling dust remove,reducing heat and improving work efficiency Color : Uncoated (Bright) ExternallyAssignedProductIdentifier1 : 887861290531 ExternallyAssignedProductIdentifier2 : 0887861290531 ExternallyAssignedProductIdentifier3 : 00887861290531 FinishType : Uncoated HandOrientation : Right IncludedComponents : 8 Hole Cutters, 2 Pilot Drills, 2 Allen Keys ItemName : Dry Diamond Core Drill Bits Set 5 PCS, 3/16"-3/8" Carbide Drill Tile Hole Saws Vacuum Brazed with Hex Shank U Type Slot Design for Ceramic, Porcelain Tiles, Marble, Granite. ItemPackageDimensions_Height : 13.1064 centimeters ItemPackageDimensions_Length : 1.6002 centimeters ItemPackageDimensions_Width : 7.2898 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : hole-saw-sets Manufacturer : XFH Material : Diamond MfgSeriesNumber : CTH5000 ModelNumber : CTH5000 NumberOfFlutes : 2 NumberOfItems : 5 NumberOfPieces : 8 PackageLevel : unit PartNumber : vacuum u 3/16-3/8in ProductDescription : High quality Diamond Grain Diamond Hole Bits are made with High-strength steel and High quality Diamond Grain. Which could not only provide fast and smooth drilling, but also ensure longer workable life. Vacuum Brazed Vacuum Brazed Diamond Technology:More Heavy Duty and Wear Resistant than electroplated diamond bit, provide very high efficiency, cuts faster, durable and sturdy. Wax insert cooling Cooling wax inside,which can cool and lubricate the drill bit while drilling. High Quality Artificial Diamonds firmly attach the steel body by Vacuum Brazed technology and are sharp, thickened and durable.