Klein Tools Knockout Punch Set with Wrench

The Klein 53732SEN set punches holes for 1/2, 3/4, 1, 1-1/4, 1-1/2 and 2 inch conduit (1.3, 1.9, 2.5, 3.2, 3.8 and 5.1 cm). That is six punches with matching dies, so it covers the full common trade range for panel and box work without having to buy individual sizes.

Everything needed to pull a hole by hand is in the kit: six punches, six matching dies, two draw studs, and a 1 inch (2.5 cm) ratcheting box end wrench. No hydraulic ram or separate driver is required. You supply the pilot hole for the draw stud.

The Klein 53732SEN is rated to cut 10 gauge mild steel, which covers typical enclosure and panelboard sheet metal. It also goes through aluminum, fiberglass and plastic. For anything heavier than 10 gauge mild steel, you want a hydraulic knockout driver instead of a manual draw stud set.

A manual set like the Klein 53732SEN turns the draw stud with a ratcheting wrench, so there is no pump, hose or battery to maintain and nothing to charge on site. It is the right call for occasional 1/2 to 2 inch holes in material up to 10 gauge mild steel. If you are cutting dozens of holes a day, or working in stainless or heavier plate, a hydraulic driver saves your arm and your time. Note the handbook warning that applies here: do not extend the wrench handle and do not hammer or push on it.

The punches in the 53732SEN cut cleanly and accurately, and they split the slug so it drops out instead of jamming in the die. A clean edge matters when you are landing a liquidtight or a sealing locknut and need the gasket to seat.

No. Klein states plainly that the 53732SEN is never to be used on or near live electrical circuits. De-energize and verify the panel before punching, and wear approved eye protection while you work.

Nine pounds all in, measuring 12-1/8 x 9-1/2 x 2.5 inches. That drops into a tool bag or van drawer easily, which matters if you are carrying it up a ladder or onto a roof for rooftop unit disconnects.

Smaller punches and larger punches use different draw stud diameters, so the kit ships with two: one sized for the lower conduit sizes and one for the larger. Both are driven with the included 1 inch ratcheting box end wrench, covering the whole 1/2 through 2 inch range.