Greenlee 33A Forged Steel Hex ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.69
Greenlee 33A Forged Steel Hex Shank Spade Bit, 1/4 IN Shank

Greenlee 33A Forged Steel Hex Shank Spade Bit, 1/4 IN Shank

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Model: 33A-3/8

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

$4.69
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Greenlee Hex Shank Spade Bit, Forged Steel

The Greenlee spade bit family is a line of forged and heat-treated boring bits designed for electricians and tradespeople who need to cut clean holes through hardwood, softwood, plywood, and drywall. Each bit in this family shares a common 1/4 IN (6.400 MM) hexagonal shank engineered for use in 1/4 IN (6.4 mm) or larger power drills, and is available in bit diameters ranging from 3/8" through 1-1/2" to match the boring needs of the job at hand. A hole in the top center of every bit allows wire to be pulled directly through the bore, streamlining installation work without a separate step, making this family a practical choice for jobsite wire-pulling and general boring tasks alike.

Key Features

  • Bit Diameter Range: Available from 3/8" through 1-1/2" to cover a wide range of boring applications.
  • Shank Size: 1/4 IN (6.400 MM) hexagonal shank shared across the family for secure, slip-resistant chucking in compatible power drills.
  • Shank Type: Hexagonal shank design for use in 1/4 IN (6.4 mm) or larger power drills.
  • Durable Construction: Forged and heat treated for long life and repeated use in demanding boring applications.
  • Wire-Pull Feature: Hole in the top center of each bit allows wire to be pulled through the bored hole, saving time on electrical rough-in work.
  • Material Versatility: Bores hardwood, softwood, plywood, and drywall with a clean, consistent cut.
  • Retail-Ready Packaging: P.O.P. packaged for easy identification and display at the point of sale.

Technical Specifications

  • Shank Size: 1/4 IN (6.400 MM)
  • Shank Type: Hexagonal
  • Bit Diameter Options: 3/8", 1-1/2"
  • Material: Forged Steel

Typical Applications

  • Boring Holes in Hardwood and Softwood Framing
  • Drilling Through Plywood Sheathing
  • Boring Holes in Drywall for Electrical Rough-In
  • Wire-Pulling Applications During Electrical Installation
  • General Residential and Commercial Electrical Rough-In Work

Why Greenlee?

Greenlee builds tools for the demands of professional electrical work, and this spade bit family reflects that focus with forged, heat-treated construction meant to hold up to repeated boring tasks on the jobsite across every diameter in the range. The integrated wire-pull hole and hexagonal shank design show attention to the practical needs of electricians running wire through framing and drywall, regardless of which bit size the job calls for. Choose Greenlee for dependable boring tools built to keep rough-in work moving efficiently from 3/8" up through 1-1/2".

Manufacturer Resources

Product Specs

list_batch:
GREE-20260923
Product Type:
Spade Bit
Configuration:
1/4" Hex Shank
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Material:
Forged Steel
Product Group:
Power Tools & Accessories

Greenlee 33A-3/8 – Frequently Asked Questions

1) Will the Greenlee 33A spade bit fit a cordless drill with a 1/4 inch hex quick-change chuck?
Yes. Every 33A spade bit uses a 1/4 inch (6.400 mm) hexagonal shank, so it drops straight into a 1/4 inch hex quick-change holder or impact driver collet, and it also chucks in a 1/4 inch or larger keyed or keyless drill chuck. The hex flats are what keep it from spinning in the chuck under load in hardwood.
2) Can you pull wire through the hole without switching tools?
Yes, that is the point of the design. There's a hole through the top center of each 33A bit, so once the bore is through the stud you can hook your wire to the bit and pull it back through the hole in the same motion. On rough-in that removes the separate fish step on every bore.
3) Which spade bit size should an electrician use for romex through studs?
Pick by the cable bundle, not the cable. The 33A range runs 3/8 inch up to 1-1/2 inch, so a small single-cable bore sits at the low end of the range and a multi-cable or conduit sleeve bore wants the larger diameters up toward 1-1/2 inch. The wire-pull hole works the same on every size.
4) Will a Greenlee 33A spade bit cut plywood and drywall, or just framing lumber?
It bores hardwood, softwood, plywood and drywall. That covers stud and joist framing, sheathing, and drywall penetrations for rough-in. It is a wood boring bit, so it is not the tool for steel stud, masonry, or tile, use a bi-metal hole saw or a masonry bit for those.
5) Do I order the Greenlee 33A as a set or individually by size?
Individually, by diameter. Each size is its own part number in the 33A series (33A-3/8, 33A-1-1/2 and so on through the 3/8 inch to 1-1/2 inch range), and they come P.O.P. packaged for display, so a shop standardizing a van stock orders the sizes it actually bores rather than a fixed kit.
6) Is the Greenlee 33A spade bit hardened, or will it dull after a few holes?
The 33A is forged steel, forged and heat treated rather than stamped, which is what lets it take repeated boring in hardwood without the cutting edge rolling over. It can be resharpened with a file on the cutting lips like any spade bit.
How fast can I get the Greenlee 33A-3/8 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 33A-3/8 come with a warranty?
Absolutely. The Greenlee 33A-3/8 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 33A-3/8?
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 33A-3/8 from ZenSupply?
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