... number: 20,30,40,60,80,100,120 20" TCT Circular Saw Blades for Wood The specification: Diameter: 110mm-500mm(4 ... 40T 60T 80T 100T 120TALLOY WOOD SAW BLADE ALLOY SLAB SAW BLADEALLOY nonferrous metals ALLOY NICKING SAW BLADE tungsten steel blade,tungsten circular saw blade for cutting steel bar