... number: 20,30,40,60,80,100,120 20" TCT Circular Saw Blades for Wood The specification: Diameter: 110mm-500mm(4 ... , 60T, 80T, 100T, 120T Outer DiameterBody ThicknesskerfHole Diameter Teeth NumberINCHMetric(mm)(mm) 20T 30T 40T4"1101.2 1.820 30T 40T 50T ... nonferrous metals ALLOY NICKING SAW BLADE tungsten steel blade,tungsten circular saw blade for cutting steel bar