Specification:Punching force: 31TMax thickness of sheet: 10mm of copper sheet/6mm of metal sheetDepth of throat: 95mmPunching dies; 3/8"(Φ10.5),1/2"(Φ13.8),5/8"(Φ17),3/4"(Φ20.5)mm----------------------------------------------------------------------Features:Punching the different kind of metal sheet up to 10mmIt can match hand pump CP-700 or electric pumpHigh-strength reurn spring for rapid cylinder retractionHigh-hardness of material for punching die, easier for operationHalf-opened casting body, widely use in different areas.