Specification Brand : BGTEC BulletPoint1 : Diameter: 7" / 180mm; Bore: 22.23mm (7/8"); Workable thickness: 4.5mm; Grit : 40/50 BulletPoint2 : Fast Sanding Efficiency: Vibration-free design greatly reduces operator fatigue and is more efficient than traditional abrasives. Under the air holes designed,it can keep the grinder cups cooler and reduce wear and tear. Double sandblasting edge design, grinding more efficient. BulletPoint3 : Easy to operate: diamond grinding wheels are easy to operate and install, which are suitable for grinders and angle grinders; Please follow the instruction of angle grinders and grinders. BulletPoint4 : Wide Application:mainly be used for dry and wet grinding and polishing Concrete, Masonry, Granite Marble and some other construction materials. BulletPoint5 : Arbor Hole Size: 1-1/4" BulletPoint6 : Abrasive Material: Aluminum Oxide Color : Gold IncludedComponents : grinding wheel ItemName : Diamond Grinding Wheels 7'' - BGTEC Grinding Cup Wheel Arbor:22.23/15.875mm for Polishing and Cleaning Marble Concrete Masonry ItemPackageDimensions_Height : 30 millimeters ItemPackageDimensions_Length : 180 millimeters ItemPackageDimensions_Width : 180 millimeters ItemPackageQuantity : 1 ItemTypeKeyword : surface-grinding-wheels Manufacturer : BGTEC ModelName : GSM090722 ModelNumber : Mrisatapg9d5y6vi4-13 NumberOfItems : 1 PackageLevel : unit PartNumber : GSM090722 ProductDescription : Item: Diamond Turbo Row Grinding Cup Wheel Specifications: Diameter: 4''(100MM)/4.5''(115MM)/5''(125MM)/7''(180MM) Grit: 40/50 Material: Alloy Blade thickness: 3MM Working thickness:5MM Applications: for grinding on marble, concrete, Masonry, and some other construction material Feature: 1. Suitable for wet or dry use 2. high quality diamond segments, suitable for hard stone 3. Big grinding segments help to increase the work efficiency 4. Strong body can bear tough work 5. 5mm segment depth for long service life