1818 electric punching shears electric scissors cutting air ducts open holes steel plate curve color steel tile tin stainless steel Technical Parameters Model No. YT-200E1818 Minimum cutting radius(mm) 25 Output speed(RPM) 1700 Input Voltage(V) 230~ Power frequency(Hz) 50 Cutting thickness(mm)Stainless steel plate 0.5-1.2 Iron plate 0.5-1.8 Motor speed(RPM) 30000 Motor power(WV) 380