Greenlee® - Conduit Sizes and Slug-Splitter SC Knockout Punch KitConduit Sizes:Hole size is the outside diameter of US conduit sizes. Example: 1/2" conduit size punch actually makes a 7/8" hole.Conduit Size Range:1/2" - 2" Conduit SizeType:Slug-Splitter SC (Self-Centering) Knockout Punch KitCapacity:Up to 10 gauge (3.5 mm) stainless steelFeatures:Self-centering punch aligns itself on the pilot holeNo need to draw crosshairs or line up die alignment marksFast, easy, and simple to operateCompact design ideal for construction sites and maintenance jobsCan drive 751 Cable Cutter headHydraulic Ram:Powerful 11-ton hydraulic ramIncluded:3-foot hose, hydraulic ram, and hand pump SKU: GRNL.7506 Brand: GREENLEE Country of Manufacture: United States Supplier Part Number: GRNL7506