35 Ton portable punch was designed to punch holes through 1/2” mild steel, aluminum and copper. The punched hole size is 1/16” larger than your bolt size. A stripper guide extends on either side of the ram to strip the material after punching. This hand-held unit will operate from any 10, 000 psi hydraulic pumping source. Some uses include the punching of bus bars, tower iron, railing, I-beams and truck frames. Custom size punch and dies are available upon request. Oval and square sizes are also available.