Suitable for cutting various hard non-metallic materials,such as marble ,granite,ceramic, ... .23CD2501 250X2.6X7X22.23CD3001 300X2.8X7X25.4CD3501 350X3.0X7X25.4Suitable for cutting various hard non-metallic materials,such as marble ,granite,ceramic ... ,floor tiles,etc.Special air hole design for cooler operation and longer life. CONTINUOUS RIM DRY BLADES(SINTERED ...