Excellent Punching: Punching force: 35T/350KN; Depth of throat: 4.3'/109 mm. The punch dies are made of high carbon tungsten steel and not easy to wear off. The max thickness of iron plate: 1/10' to 2/5' (3-10 mm), the max thickness of copper/aluminum bar: 1/10' to 1/2' (3-12.7 mm), the max thickness of stainless steel: 1/10' to 3/10' (3-8 mm). 4 Pairs of Dies: The hydraulic puncher comes with four pairs of punching dies of 3/8'(10.5 mm), 1/2'(13.8 mm), 5/8'(17.5 mm), 3/4'(20.5 mm). Different dies are designed for precise hole punching. It also features accurate positioning without offset. Durable Steel Structure: This hydraulic hole punching tool features high strength and good toughness with premium alloy steel construction. And the heavy-duty metal hole punch tool needs to connect with a hydraulic pump to get ideal performance(The pump is not included). The plastic cap protects the punching tool from dust