Specification Brand : JeeynoTols BulletPoint1 : 【Size】Diameter 1PC 3-1/4"(82mm); 5/8"-11 Thread; Total length 60mm; Working length 50mm; Diamond Grit Fine BulletPoint2 : 【Application】Designed to Enlarge, Shape, Polish, Clean, Trim, Finish, Round or Bevel Existing Rough Holes of Marble Ceramic Porcelain Tiles Granite.. Also Easily Create Round Shape Indentation to Accommodate Pipes or Electric Wire Lines BulletPoint3 : 【High Performance】Vacuum brazing technology makes the High-quality diamond grain firmly bonded to the matrix, and the diamond exposure is higher, the processing efficiency is higher, and the service life is longer.Helps smooth rounded cuts and takes time off of install. BulletPoint4 : 【Save Money Tools】With just one standard diamond core drill bit and a beveling chamfer bit you are able to create many different hole sizes, without needing to buy several different core bits.You are able to create many different hole sizes 1-1/16" (27mm) to 3-1/4" (82mm) BulletPoint5 : 【Attention】Can Not be Used to Drill Holes, But to Enlarge, Shape and Trim the Existing Holes. It Fits on 5/8""-11 Thread Angle Grinder and Can be Used With Water or Not, No Chips, Very Easy to Operate. Recommended Speed 6000RPM, Maximum Speed 11000RPM FinishType : Diamond ItemName : JeeynoTols Diamond Beveling Chamfer Bit - 3-1/4"(82mm) Metal Beveling Tool for Tile Enlarging Shaping Granite Marble Tiles Existing Holes, 5/8"-11 Thread for Angle Grinders ItemPackageDimensions_Height : 8.6106 centimeters ItemPackageDimensions_Length : 8.2042 centimeters ItemPackageDimensions_Width : 8.4074 centimeters ItemPackageQuantity : 1 ItemShape : Oval ItemTypeKeyword : countersink-bits Manufacturer : JeeynoTols Material : Diamond ModelNumber : a22010500ux0500 NumberOfItems : 1 PartNumber : B06825801 ProductDescription : Recommended: If fixed on Hand Drills,you could use Hex shank or Triangle shank Adapter to 5/8-11 thread. If fixed on Hammer Drills,please use SDS plus shank Adapter to 5/8-11 thread.Also shut down hammer mode while using the diamond coated milling bit. Other imoprtant tips: When using diamond tools, there are several important factors to consider to ensure safe and effective usage. Safety Gear: Always wear appropriate safety gear, including safety glasses or goggles, gloves, and a dust mask or respirator if necessary. Proper Handling: Handle diamond tools with care, as they can be fragile and easily damaged. Compatibility: Ensure that the diamond tools you're using are suitable for the material you're working on. Mounting and Alignment: Follow our instructions for mounting and aligning the diamond tools correctly. Improper installation can lead to inefficient operation or even accidents. Operating Speed: Be aware of the recommended operating speed for the diamond tools. Cooling and Lubrication: Pay attention to the manufacturer's recommendations for cooling or lubricating the tool to prevent overheating and prolong its lifespan. Pressure and Feed Rate: Apply the appropriate pressure and maintain a consistent feed rate when using diamond tools. Operator Experience: It is essential to have experience or receive proper training before using diamond tools. Regular Inspections: Before and after each use, inspect the diamond tools for any signs of damage or wear.Damaged tools should be replaced to avoid safety hazards.