... /25.4/30mm Hole dimater: 20, 20/25.4/30mm Tooth number: 20,30,40,60,80,100,120 20" TCT ... .2mm Hole dimater: 20, 20/25.4, 25.4/30mm Tooth number: 20T, 30T, 40T, 60T, 80T, 100T, 120T Outer DiameterBody ... SLAB SAW BLADEALLOY nonferrous metals ALLOY NICKING SAW BLADE 8" tungsten carbide saw blade for cutting paper