Greenlee 7211BB-1 1" CONDUIT P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$116.70
Greenlee 7211BB-1 1" CONDUIT PUNCH UNIT

Greenlee 7211BB-1 1" CONDUIT PUNCH UNIT

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Model: 7211BB-1

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

$116.70
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Greenlee K2BB-2 2" Slug-Buster Round Knockout Punch Set

The Greenlee K2BB-2 Slug-Buster Knockout Set is a 2" conduit size (2.42" or 61.5 mm) punch and die assembly built for cutting clean, round knockouts into mild steel, brass, copper, aluminum, fiberglass, and plastic enclosures. Designed to replace the legacy 7211BB-2, this knockout set features a unique punch profile that splits slugs for easy removal, alignment markings for accurate hole placement, and a knurled edge that improves grip during setup. The punch and die are Made in USA and are intended for use with the Greenlee KRW-1 ratchet wrench, making this set a dependable choice for electricians and panel fabricators who need fast, repeatable 2" knockouts in the field or shop.

Key Features

  • Trade Size: Sized for 2" conduit (2.42" or 61.5 mm) openings, matching standard conduit hub dimensions for panels and enclosures.
  • Durable Construction: Punch is manufactured from 10 ga mild steel for repeated use in demanding installation environments.
  • Slug-Splitting Punch Profile: The unique punch geometry splits slugs during the cut, allowing for easy, fast slug removal without extra tooling.
  • Alignment Markings: Printed alignment marks help improve accuracy when positioning the punch on the enclosure surface.
  • Knurled Grip: A knurled edge on the set provides a more secure grip during operation and reduces slippage.
  • Laser Marked: Laser markings on the set allow for quick part identification in a crowded toolbox or truck.
  • Multi-Material Compatibility: Rated for use in mild steel, brass, copper, aluminum, fiberglass, and plastics, with capacity optimized for mild steel.
  • Round Shape: Produces a clean, round knockout suited for standard conduit connectors and fittings.

Technical Specifications

  • Country of Origin: United States
  • Size: 2" Conduit (2.42" or 61.5 mm)
  • Thickness: Punch 10 ga mild steel
  • Type: Knockout Set
  • Material Compatibility: For use in mild steel, brass, copper, aluminum, fiberglass and plastics
  • Shape: Round
  • Capacity: Optimized for use in mild steel

Typical Applications

  • Cutting 2" Conduit Knockouts in Electrical Enclosures and Panels
  • Panel Fabrication and Custom Enclosure Modification
  • Field Installation of Conduit Hubs and Connectors
  • Working with Mild Steel, Brass, Copper, Aluminum, Fiberglass, and Plastic Enclosures
  • Use with Greenlee KRW-1 Ratchet Wrench for Manual Knockout Operations

Why Greenlee?

Greenlee builds the K2BB-2 Slug-Buster punch and die in the USA using 10 ga mild steel construction, with a slug-splitting punch profile that speeds up removal and reduces downtime on the job. Alignment markings, a knurled grip, and laser-marked identification reflect Greenlee's focus on practical, field-tested design details that help electricians and panel builders work faster and more accurately on 2" conduit knockouts.

Manufacturer Resources

Spec Sheet

Product Specs

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

Greenlee 7211BB-1 – Frequently Asked Questions

1) What size hole does the Greenlee K2BB-2 Slug-Buster knockout punch cut?
The K2BB-2 cuts a round 2 inch conduit knockout, 2.42 inches (61.5 mm) actual diameter. That matches standard 2 inch conduit hub dimensions, so the hole takes a normal 2 inch connector or fitting without reaming.
2) Do I need a separate wrench or driver to use this Greenlee conduit punch set?
Yes. The punch and die assembly is intended for use with the Greenlee KRW-1 ratchet wrench, which is a separate tool. The set itself is just the punch and die, so plan on the KRW-1 for manual operation.
3) Will a Greenlee Slug-Buster punch cut through stainless steel enclosures?
No. Material compatibility is mild steel, brass, copper, aluminum, fiberglass and plastics, with capacity optimized for mild steel. Stainless is not among the rated materials, so use a punch rated for stainless instead of forcing this one.
4) Does the Greenlee K2BB-2 replace the older 7211BB-2 punch unit?
Yes, the K2BB-2 is the current designation replacing the legacy 7211BB-2 in the 2 inch conduit size. If your shop list still calls out 7211BB-2, the K2BB-2 is the part to order.
5) How thick a panel can this knockout punch handle?
The punch is rated for 10 gauge mild steel. That covers typical electrical enclosures, panel boards and custom fabricated boxes; heavier plate is beyond its stated capacity.
6) What conduit sizes are offered in this Greenlee Slug-Buster knockout punch set?
Two sizes: a 1 inch unit ordered as 7211BB-1, and a 2 inch unit ordered as K2BB-2 (2.42 inches / 61.5 mm). Each is a single-size punch and die, not a multi-size kit, so order by the conduit trade size you are cutting for.
7) Do I have to pry the slug out after punching, or does it drop free?
The Slug-Buster punch profile splits the slug as it cuts, so the pieces come out by hand without a screwdriver or pliers. That is the main working difference from a plain round punch, and it is what saves time when you are cutting several holes in one panel.
8) Is this Greenlee punch set made in the USA?
Yes. The punch and die are made in the USA, with country of origin listed as United States, which matters if you are buying against a domestic-preference or government procurement spec.
9) How do I get the hole in the right spot when punching an enclosure?
Printed alignment marks on the punch help you position it on the enclosure surface before drawing it through, and a knurled edge gives you grip while setting up so the assembly does not slip as you start the draw.
How fast can I get the Greenlee 7211BB-1 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 7211BB-1 come with a warranty?
Absolutely. The Greenlee 7211BB-1 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 7211BB-1?
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 7211BB-1 from ZenSupply?
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