Klein Tools 53837 1.362-Inch Knockout Punch for 1-Inch Conduit

Klein Tools offers this punch in two conduit sizes: model 53837 for 1-inch conduit and model 53867 for 2-inch conduit. Order by that MPN so you get the matching die and punch set for the conduit trade size you are running.

Maximum capacity is 10 gauge mild steel. That covers typical enclosure, panelboard, and junction box walls. It also cuts aluminum, fiberglass, and plastic, so the same punch works on non-metallic enclosures and NEMA covers.

No. This Klein punch is rated to 10 gauge mild steel, plus aluminum, fiberglass, and plastic. Stainless is not among the materials it is rated for, so for stainless enclosures you want a punch set specifically rated for stainless and a hydraulic driver rather than this one.

What you get is the knockout punch itself, a punch and die for the conduit size you order (1-inch or 2-inch). The draw stud and the means of pulling it, a ratchet wrench or hydraulic ram, are separate items you supply. If you are standardizing a crew, match the draw stud thread to the driver you already run before adding punch sizes.

Yes, as long as the existing opening is smaller than the punch and the panel is 10 gauge mild steel or thinner. The punch pilots on the draw stud through a center hole, so an existing undersized knockout can be used as the pilot hole and stepped up to the 1-inch or 2-inch conduit size. It cuts clean enough that the hole takes a standard conduit connector without reaming.

The punch carries a black oxide finish, which gives light corrosion resistance and reduces galling as the punch pulls through steel. It is not plating, so keep it lightly oiled if it lives in a damp gang box.