... 30mm Hole dimater: 20, 20/25.4/30mm Tooth number: 20,30,40,60,80,100,120 ... 20" TCT Circular Saw Blades for Wood The specification: Diameter: 110mm-500mm(4"-20 ... Hole dimater: 20, 20/25.4, 25.4/30mm Tooth number: 20T, 30T, 40T, 60T, 80T, 100T, ... SAW BLADE ALLOY SLAB SAW BLADEALLOY nonferrous metals ALLOY NICKING SAW BLADE tungsten steel blade,tungsten circular saw blade for cutting steel bar