*DURABLE STEEL STRUCTURE - This hydraulic hole punching tool features high strength and good toughness with premium alloy steel construction. It has a flat seat, smooth and not fall. Quick to change the dies. _x000D_*PUMP REQUIRED - The heavy-duty metal hole punch tool needs to connecting with a hydraulic pump to get ideal performance. The plastic cap protects the punching tool from dust. Prepare the pump by yourself. _x000D_*EXCELLENT PUNCHING & CH-60 - Punching force: 31T/310KN; Depth of throat: 3.74"/95 mm; Puncher Aperture(4 pairs): 3/8"(10.5 mm), 1/2"(13.8 mm), 5/8"(17.5 mm), 3/4"(20.5 mm). The punch dies are made of high carbon tungsten steel and not easy to wear off. _x000D_*COMPACT SIZE & PORTABLE - A thickened and rubberized handle, increasing the friction, gives you a comfortable and anti-slip using experience, suitable for long-lasting use. It is convenient and energy-saving to operate this punching tool. _x000D_*WIDE APPLICATION - It is a split hole puncher, used for punching for metal plate, iron, aluminum, copper, stainless steel, etc. It is popular in the electricity industry, construction, etc. _x000D_ ******************************************************************************************************* *Specifications _x000D_Punching force:310KN(31T) _x000D_Depth of throat: 3.74"(95 mm) _x000D_Aperture(4 pairs): 3/8"(10.5 mm), 1/2"(13.8 mm), 5/8"(17.5 mm), 3/4"(20.5 mm) _x000D_Max. Thickness of iron plate: 3-8 mm/ 1/10-3/10 inch _x000D_Max. Thickness of copper bar: 3-10 mm/ 1/10-4/10 inch _x000D_Max. Thickness of aluminum: 3-10 mm/ 1/10-4/10 inch _x000D_Max. Thickness of stainless steel: 3-6 mm/ 1/10-1/5 inch _x000D_Weight:38.7 LB/17.6 KG _x000D_*Pakcage Content _x000D_1 x Puncher _x000D_1 x Concave pressing plate _x000D_4 x Dies(one of them in the puncher) _x000D_1 x Allen wrench _x000D_