Make smooth radian surface in sheet metal without heating and hammering. Easy for adjust and assembly. Quick adjust lower anvil yoke for easy leveling. Bottom Anvil Dies for different radian. All steel construction. Includes heavy duty welded steel stand with( 4) 1/2-inch mounting holes and anvil die storage, will handle up to 1.6mm/16 gauge of sheet. Metal and 2mm/14 gauge of cooper & aluminum. Type: Heavy Duty Top Anvil Die diameter (mm//in): 203.2 // 8 7pcs Bottom Anvil Dies shaping radius(mm//in): 6.35//1/4, 50.8//2, 72.6//3, 101.6//4, 152.4//6, 203.2//8, 304.8//12 Throat (mm//in): 711 // 28