Greenlee K2BB Slug-Buster Manu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$72.46
Greenlee K2BB Slug-Buster Manual Knockout Set, Round Punch

Greenlee K2BB Slug-Buster Manual Knockout Set, Round Punch

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Model: K2BB-1/2

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

$72.46
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Greenlee K2BB Slug-Buster Manual Knockout Set, Round Punch

The Greenlee K2BB Slug-Buster Manual Knockout Set is a conduit-size punch and die assembly built for electricians who need clean, round knockouts in mild steel enclosures and panels. This family is available in trade sizes ranging from 1/2" through 1-1/2" (1/2", 3/4", 1", and 1-1/2"), so crews can match the punch to the conduit size on hand. Every size in the K2BB line shares the same unique round punch profile that splits slugs for easy removal, alignment markings for improved accuracy, and a knurled edge for a better grip during operation. This set replaces the legacy Greenlee 60246 and is designed for use with the Greenlee KRW-1 ratchet wrench. Across the entire size range, the punch and die are Made in USA, and the punch is manufactured from 10 ga mild steel for durability on the job.

Key Features

  • Trade Size Range: Available from 1/2" through 1-1/2" (1/2", 3/4", 1", 1-1/2") to match common conduit knockout sizes.
  • Round Punch Profile: A unique round punch profile splits slugs cleanly for easy removal during conduit knockout operations, consistent across every size in the range.
  • Durable Construction: Punch is made from 10 ga mild steel across all sizes, optimized for use in mild steel applications for long-lasting performance.
  • Alignment Markings: Precision alignment markings improve accuracy when positioning any size knockout set on the work surface.
  • Knurled Grip Edge: A knurled edge provides a better grip for secure handling during installation on every punch in the set.
  • Laser Marked Identification: Laser markings allow for quick part identification on the job site, helpful when carrying multiple sizes.
  • Compatible Wrench: Designed for use with the Greenlee KRW-1 ratchet wrench for efficient operation regardless of size selected.
  • Broad Material Compatibility: Suitable for use in mild steel, brass, copper, aluminum, fiberglass, and plastics.
  • Direct Replacement: Replaces the Greenlee 60246 knockout set for straightforward upgrades.

Technical Specifications

  • Type: Knockout Set
  • Shape: Round
  • Available Sizes: 1/2", 3/4", 1", 1-1/2"
  • Capacity: Optimized for use in mild steel
  • Thickness: Punch 10 ga mild steel
  • Material Compatibility: For use in mild steel, brass, copper, aluminum, fiberglass and plastics
  • Product Height: 1.5 inches
  • Product Width: 3.25 inches
  • Weight: 0.9 pounds
  • Country of Origin: United States

Typical Applications

  • Electrical Panel and Enclosure Fabrication
  • Conduit Knockout Punching in Mild Steel Panels
  • Knockout Work in Brass, Copper, Aluminum, Fiberglass, and Plastic Enclosures
  • Commercial and Industrial Electrical Installations
  • Panelboard Modification and Retrofit Work

Why Greenlee?

Greenlee's K2BB Slug-Buster Manual Knockout Set combines a Made in USA punch and die with a purpose-built round profile that splits slugs for fast, clean removal, available across the 1/2" to 1-1/2" size range so electricians can standardize on one system for multiple conduit sizes. The 10 ga mild steel punch construction, knurled grip, alignment markings, and laser identification reflect the precision and durability electricians expect from Greenlee tools built for demanding, code-compliant electrical work.

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Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
GREE-20260923
Product Type:
Knockout Set
Country Of Origin:
United States
Department:
Electrical
Product Subgroup:
Knockout Punches
Product Material:
Mild Steel
Product Height:
1.5 inches
Volume:
0.9 pounds
Product Width:
3.25 inches
Product Details:
Knockout Set
Product Group:
Electrical Installation Tools

Greenlee K2BB-1/2 – Frequently Asked Questions

1) What conduit sizes does the Greenlee K2BB Slug-Buster knockout set cover?
The K2BB Slug-Buster comes in four trade sizes: 1/2 inch, 3/4 inch, 1 inch, and 1-1/2 inch, ordered individually by size (K2BB-1/2, K2BB-3/4, K2BB-1, K2BB-1-1/2). Each is a matched punch and die for that one conduit size, so if you run a mix of sizes on a panel job you need the corresponding set for each.
2) Do I need a separate wrench or driver to use the K2BB knockout punch?
Yes. The K2BB is a manual punch and die set with no drive unit included; it is made to run with the Greenlee KRW-1 ratchet wrench. Budget for the KRW-1 if you do not already have one, otherwise you have the punch and nothing to turn it with.
3) I have an old Greenlee 60246 knockout set. Is the K2BB the current replacement?
It is. The K2BB Slug-Buster replaces the legacy Greenlee 60246 knockout set, so you can move to it directly without changing the way you work the hole.
4) What does the Slug-Buster round punch profile actually do differently?
The round profile splits the slug as it punches instead of leaving one solid disc, so the piece drops out or lifts free without prying at it with pliers. On a panel with twenty knockouts that is the difference that saves time. The punch also carries alignment markings for positioning and a knurled edge for grip while you set it up.
5) Is the Greenlee K2BB made in the USA?
Both the punch and the die are made in the USA across the full 1/2 inch to 1-1/2 inch size range, which matters if you are buying against a domestic-preference or Buy American procurement spec.
6) Will a 1/2 inch K2BB punch make the right hole for 1/2 inch conduit?
Yes. The K2BB sizes are conduit trade sizes, not raw hole diameters, so the 1/2 inch set punches the correct knockout for 1/2 inch trade conduit and fittings. Match the punch to the conduit size, not to a measured hole.
7) How big and heavy is a single K2BB knockout set to carry in a pouch?
A K2BB set measures 1.5 inches high by 3.25 inches wide and weighs 0.9 pounds, so it drops into a tool pouch easily. Carrying all four sizes is still under four pounds. Laser-marked identification on each piece keeps the sizes sorted when several are loose in the same bag.
8) Can I use the K2BB for retrofit work on panelboards already in service?
That is one of its intended uses. Manual punch and die sets like the K2BB are used for panelboard modification and retrofit work, as well as new enclosure fabrication and commercial or industrial installs, because a manual punch gives you a clean round hole without drilling swarf or heat in a live-adjacent panel.
How fast can I get the Greenlee K2BB-1/2 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 K2BB-1/2 come with a warranty?
Absolutely. The Greenlee K2BB-1/2 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 K2BB-1/2?
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 K2BB-1/2 from ZenSupply?
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