Klein Tools Knockout Punch Set...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$49.19
Klein Tools Knockout Punch Set

Klein Tools Knockout Punch Set

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Model: 53728SEN

In Stock (leaves warehouse same day if ordered before 3pm ET)

$49.19
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Knockout Punch Set, 1/2-Inch

  • Warnings

    • Always wear approved eye protection.
    • Never use on or near live electrical circuits.

  • Features

    • Punches holes cleanly and accurately
    • Maximum capacity of 10 gauge mild steel
    • Set includes 1/2-Inch (13 mm) punch and die with 3/8-Inch (9.5 mm) draw stud
    • Slugs are split inside for easy removal
    • Punch Set optimized design reduces wrench effort
    • Also cuts aluminum, fiberglass and plastic


53728SEN - spec sheet

Product Specs

Department:
Electrical
Product Type:
Knockout Set
Product Subgroup:
Knockout Punches
Product Group:
Electrical Installation Tools

Klein Tools 53728SEN – Frequently Asked Questions

1) What sizes does the Klein Tools knockout punch set come in?
Two conduit sizes: a 1/2-inch set (Klein 53728SEN) and a 3/4-inch set (Klein 53727SEN). Each one is a single-size kit, so if you need both trade sizes on a panel you order both.
2) What is actually included in the Klein 1/2-inch knockout punch set?
The 1/2-inch set (53728SEN) ships with the 1/2-inch (13 mm) punch and matching die plus a 3/8-inch (9.5 mm) draw stud. You still need a wrench to drive it, or a hydraulic/ratchet driver if you prefer not to turn it by hand.
3) How thick a steel enclosure can a Klein knockout punch go through?
Maximum capacity is 10 gauge mild steel. That covers standard sheet steel panel boxes, gutters and wireway, but it is the ceiling, so do not try it on heavier plate or structural steel.
4) Will this punch work on a fiberglass or plastic enclosure, not just steel?
Yes. Besides mild steel it cuts aluminum, fiberglass and plastic, so the same punch and die handles an aluminum pull box or a non-metallic enclosure.
5) Does the hole from this knockout punch actually fit 1/2-inch conduit, or is it a 1/2-inch hole?
The punch is sized to the conduit trade size, not the raw hole measurement, so the 1/2-inch punch produces the correct knockout for 1/2-inch (13 mm) conduit and connectors. Same logic on the 3/4-inch set.
6) Do I need a hydraulic driver to use this, or can I turn it with a wrench?
It is a manual draw-stud punch driven with a wrench. Klein lists the design as optimized to reduce wrench effort, so a hand wrench on the 3/8-inch draw stud is the intended method on 10 gauge and lighter material.
7) Can I use a knockout punch on an energized panel?
No. Klein's instructions are explicit: never use it on or near live electrical circuits, and always wear approved eye protection. De-energize and verify the panel before you set the draw stud.
8) How do you get the slug out after punching a panel?
The slugs are split inside the punch, so they break and drop free instead of wedging in the die. That saves prying a disc out of the cup on each hole, which matters when you are drilling out a full gutter.
9) I already own a 3/8-inch draw stud. Can I buy just the punch and die?
Both Klein sets (53727SEN and 53728SEN) are sold as punch, die and 3/8-inch draw stud together. If you already have a 3/8-inch stud, the spare simply backs up the one in your pouch, and the punch and die in each set are matched to the same 3/8-inch stud thread you are already using.
How fast can I get the Klein Tools 53728SEN delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools 53728SEN come with a warranty?
Absolutely. The Klein Tools 53728SEN is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools 53728SEN?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools 53728SEN from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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