Greenlee 7211EBB-204 Slug-Bust...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$91.43
Greenlee 7211EBB-204 Slug-Buster Metric Punch Unit, 20.4 mm

Greenlee 7211EBB-204 Slug-Buster Metric Punch Unit, 20.4 mm

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Model: 7211EBB-20.4

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

$91.43
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Greenlee 7211EBB-204 Slug-Buster® Metric Punch Unit, 20.4 mm

The Greenlee 7211EBB-204 Slug-Buster® Metric Punch Unit is a 20.4 mm round knockout punch engineered for use with battery-powered, hydraulic, ratchet, or manual drivers. This punch is part of Greenlee's Slug-Buster® line, the contractor's choice worldwide, and uses standard Greenlee dies and draw studs so it drops right into an existing Greenlee tooling setup. Its unique punch profile splits the slug during the punching operation, making slug removal faster and easier on the job site. Slug-Buster® punches in this family are available in sizes up through 2.52 IN (64.0 mm), giving electricians and panel builders a consistent, compatible sizing system for round knockouts across a wide range of enclosure and panel applications.

Key Features

  • Trade Size: 20.4 mm round punch for precise metric knockout sizing.
  • Slug-Splitting Design: Unique punch profile splits slugs for easier, faster removal after punching.
  • Universal Driver Compatibility: Works with battery-powered, hydraulic, ratchet, or manual drivers for flexibility across job sites.
  • Standard Tooling Compatibility: Uses standard Greenlee dies and draw studs, simplifying inventory and tooling changeovers.
  • Patented Design: Covered by U.S. Patent #4,543,722 for the Slug-Buster® slug-splitting technology.
  • Size Range Compatibility: Part of a Slug-Buster® family available in sizes up through 2.52 IN (64.0 mm).
  • Shape: Round profile for standard round knockout applications.

Technical Specifications

  • Country of Origin: United States
  • Size: 20.4 mm
  • Type: Slug-Buster® Metric Punch Unit
  • Sub Brand: Slug-Buster®
  • Shape: Round

Typical Applications

  • Punching Round Knockouts in Electrical Enclosures and Panels
  • Metric Conduit and Cable Entry Preparation
  • Field Installations Requiring Battery-Powered or Hydraulic Drivers
  • Panel Shop and Enclosure Manufacturing
  • Maintenance and Retrofit Electrical Work

Why Greenlee?

Greenlee's Slug-Buster® punch units are trusted by contractors worldwide for their patented slug-splitting design and broad compatibility with standard Greenlee dies, draw studs, and driver types. Manufactured in the United States, this 20.4 mm round punch unit delivers the fit, function, and reliability electricians expect from Greenlee tooling on every job.

Manufacturer Resources

Product Specs

list_batch:
GREE-20260923
Product Type:
Knockout Punch
Configuration:
Round
Series:
Slug-Buster
Country Of Origin:
United States
Department:
Electrical
Product Subgroup:
Knockout Punches
Product Material:
Steel
Product Size:
20.4 mm
Product Group:
Electrical Installation Tools

Greenlee 7211EBB-20.4 – Frequently Asked Questions

1) Will the Greenlee 7211EBB-20.4 punch work with my battery-powered knockout driver, or do I need a hydraulic ram?
Either works. The 7211EBB-20.4 Slug-Buster punch unit is built for battery-powered, hydraulic, ratchet, or manual drivers, and it uses standard Greenlee dies and draw studs, so it drops into tooling you already own without an adapter.
2) What hole size does the Greenlee 7211EBB-20.4 Slug-Buster punch actually cut?
It cuts a 20.4 mm round hole. That is a metric trade size, not an inch equivalent, so if your drawing calls out a fractional-inch knockout you want an inch-sized Slug-Buster instead.
3) Is the punch unit a complete set, or do I still need a die and draw stud?
A punch unit is the punch itself. It runs on standard Greenlee dies and draw studs, so if you already have a Greenlee setup you can pair it with what is in your case; if you are starting from scratch you need the matching die and a draw stud sized to your driver.
4) Why choose a Slug-Buster punch over a standard round knockout punch?
The Slug-Buster profile splits the slug as it punches, so the disc breaks free instead of wedging in the die. On overhead or in-panel work where you cannot get a screwdriver behind the hole, that saves real time. The slug-splitting design is covered by U.S. Patent #4,543,722.
5) What is the Greenlee 7211EBB-20.4 punch made of, and where is it made?
Steel construction, manufactured in the United States. Specifiers who need domestic-origin tooling on a government or institutional job can use it on that basis.
6) If I need larger knockouts on the same job, can I stay in the Slug-Buster line?
Yes. Slug-Buster round punches run up through 2.52 in (64.0 mm), so you can standardize on one sizing system and one set of dies and draw studs across small conduit entries and large panel openings.
How fast can I get the Greenlee 7211EBB-20.4 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 Greenlee 7211EBB-20.4 come with a warranty?
Absolutely. The Greenlee 7211EBB-20.4 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 Greenlee 7211EBB-20.4?
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 Greenlee 7211EBB-20.4 from ZenSupply?
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