Hydraulic Hole Punch Knockout Set 6 Dies (22 - 60 mm, 7/8" - 2 3/8",11 tons)K-8E Go to amazon.com Related posts 14 best hydraulic knockout set FeaturePunch dies (): 7/8", 1 1/16", 1 3/8", 1 1/4", 1 7/8, 2 3/8"Stroke: 0.9"Rated output: 8 tonsMax. thickness (steel): 0.06" DescriptionLightweight hydraulic hole puncher set has a capacity of 8ton of maximum pressure.