Yescom 9 Ton 6 Dies Hydraulic Knockout Punch Driver Kit Hand Pump Hole Tool with Carrying Case Blue 6 Dies & Punches Interchangeable to Meet Different Needs Max Pressure: 9 ton Max Thickness for Steel: 3.2 mm(11 gauge) Max Thickness for Stainless Steel: 2 mm(14 gauge) Portable Sturdy Plastic Case for Convenient traveling