Specification Brand : uxcell BulletPoint1 : Drilling Diameter: 50mm / 1.77-inch; Total Length: 83mm / 3.27-inch. BulletPoint2 : Material: Diamond coating maximizes performance and retains a sharper cutting edge. BulletPoint3 : Application: Suitable tool for cutting accurate holes in some materials such as stone and concrete. BulletPoint4 : Note: Please remember to use at a low speed and work with coolant when processing. BulletPoint5 : Package Content: 1pc x Hole Saw. Provide different sizes to satisfy your demands. Color : Blue CompatibleMaterial1 : Glass CompatibleMaterial2 : Stone CompatibleMaterial3 : Ceramic CompatibleMaterial4 : Marble ItemName : uxcell 50mm Diamond Drill Bits Hole Saws Cutter Tool for Stone Concrete ItemPackageDimensions_Height : 19.812 centimeters ItemPackageDimensions_Length : 8.255 centimeters ItemPackageDimensions_Width : 10.16 centimeters ItemTypeKeyword : hole-saws Manufacturer : uxcell Material : Carbon Steel ModelName : Bognajinqks5whg49m ModelNumber : Bognajinqks5whg49m PartNumber : a19010900ux0972 ProductDescription : Description: * This hole saw needs to be used at a low speed, about 800-1000RPM. * Please start your hole diagonally, make a round trace and then hold drill straight. * In order to prolong the life of this glass hole saw, please work with coolant when processing. * Widely used for drilling marble, tile ceramic, stone, rebar concrete, etc.