This item 110V 900W Electric Hydraulic Hole Puncher Steel Plate Hole Punching Tool 10T MHP-20 With Dies Set Electro Metric Steel Local Metal Kit 10T USA STOCK CCTI Electric Hydraulic Hole Puncher - Punching Thickness Up to 1/4"(6 mm) in Mild Structure Steel, Perfect Steerable Transfer Cartludes 5 Sets Punch/Die Dia 6.5mm - 20.5mm(Model: EHP-20A)