Features Material: Made of quality high speed steel, these circular saw blades are quite durable Size: Inner bore diameter is 11.1mm and it will fit for many electric saw machines Sharpen: Saws blades teeth are very sharpen which ensure fast and fluent cutting Application: Black saw blades can cut soft metals such as aluminum, copper and plastic, yellow one is for wood, and silver one is for ceramics and tiles Wide Application: Widely used on marble cutting machines, electric hand saws, sliding table saws, etc Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: High speed steel Outer Diameter: 54.8mm/2.15" Bore Diameter: 11.1mm/0.43" Mandrel Length: 50mm/1.97" Mandrel Shank Diameter: 6mm/0.23" Package List: 1 Set Circular Saw Blades