Designed for removing mortar joints from brickwork. Diamond segments for strength and durability. Disc Diameter: 125mm Cutting Edge: 7mm Cutting Thickness: 6.4mm Bore Size: 22.2mm Max RPM: 12,500 Quantity - 1 Please note:These blades may be used either dry or wet as the job or equipment allows. When used with water the blades will cut quicker and last longer and create less dust. Do not use wet when using any electrical hand tool such as an electric grinder, it is not safe to use water because of the electrical power source.