Long-life Tungsten Carbide-tipped Circular Saw Blades that give performance and value. Reduction Rings available for specific bore sizes. This range offers a wide variety of quality blades for wood, non-ferrous metal, aluminium and plastic for a number of cut types. Specifications: Diameter 250mm. Number of teeth 80. Cutting bore 16 or 25 or 30mm. Fine cut and clean. For cutting aluminium / plastic.