The RUBI TPL 250 EXT Pro Diamond Blade has been specially designed for landscaping materials; porcelain, ceramic, natural stone and sintered stone materials, greater than 20mm. It offers a great combination of high performance and cutting speed with high-quality finishes. Holes in the core to help cool the disc and distribute water evenly across the disc.Specifications:Diameter: 250mm.Bore: 25.4mm.Thickness: 1.6mm.