ITEM NAME:4 inch 40T Circular Saw Blade Wood Cutting Round Discs Sawing Cutter Tool Product Description Item type: saw cutting blade Material: alloy Color: as picture shows Diameter: 4" Teeth quantity: 40T Thickness: 1.5mm/0.06" Center hole: 20mm/0.79" Suitable machines: wood circular saw machines, aluminum cutting machines etc Function: cutting wood or aluminum materials etc Note: Please allow 1-3mm error due to manual measurement..Teeth quantity: 40T. Suitable machines: wood circular saw machines, aluminum cutting machines etc. Item type: saw cutting blade. Also note that monitor settings may vary from computer to computer and may distort actual colors.