Greenlee Nail Eater� 5/8" x 18...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$53.26
Greenlee Nail Eater� 5/8" x 18" Extreme Auger Bit with Self-Feeding Screw Point

Greenlee Nail Eater� 5/8" x 18" Extreme Auger Bit with Self-Feeding Screw Point

(No reviews yet) Write a Review

Model: 66PT-5/8

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

$53.26
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Greenlee Nail Eater� 5/8" x 18" Extreme Auger Bit with Self-Feeding Screw Point

Professional drilling solution engineered to cut through nails and deliver extended service life

The Greenlee Nail Eater� 5/8" x 18" Extreme Auger Bit combines patented cutting technology with heat-treated steel construction to deliver reliable performance in demanding drilling applications. Featuring a unique patented design cutting angle and self-feeding screw point, this professional-grade bit provides smoother starts, reduced cutting loads, and the ability to cut through nails while maintaining longer tool life. The hexagonal shank design ensures secure chuck engagement for consistent power transfer during operation.

Professional Features & Benefits

  • 5/8" diameter with 18" overall length: Optimal size for standard framing applications while providing reach through multiple abutting 2x4s
  • Heat-treated steel construction: Super tough material delivers enhanced durability and resistance to wear in extreme drilling conditions
  • Patented cutting angle design: Unique geometry provides smoother starts and reduced cutting loads for improved operator control
  • Self-feeding screw point: Draws bit through wood automatically, reducing operator fatigue and improving drilling efficiency
  • Nail cutting capability: Engineered to cut through nails encountered during drilling, eliminating work interruptions
  • Improved cutting edge technology: Delivers 30% longer life span compared to standard bits for enhanced value
  • Hexagonal shank design: 7/16" hex shank provides secure chuck engagement and prevents slipping during operation

Technical Specifications

  • Bit Diameter: 5/8 IN (15.900 MM)
  • Country Of Origin: China
  • Overall Length: 18.000 IN (457.200 MM)
  • Product Material: Heat Treated Steel
  • Product Type: Extreme
  • Product Weight: 0.800 LB (363.000 GM)
  • Shank Diameter: 7/16 IN (11.100 MM)
  • Shank Type: Hexagonal
  • Sub Brand: Nail Eater�
  • Twist Length: 15.000 IN (381.000 MM)

Installation & Operation

  1. Mount the bit securely in a compatible drill chuck, ensuring the hexagonal shank is fully seated and tightened.
  2. Position the drill at the desired drilling location and align the bit perpendicular to the work surface.
  3. Start drilling at low speed to allow the self-feeding screw point to engage and draw the bit into the material.
  4. Maintain steady pressure and allow the patented cutting design to work efficiently through wood and any encountered nails.
  5. Clear debris periodically during deep drilling operations to maintain optimal cutting performance.
  6. Complete the drilling operation and remove the bit carefully, checking for any damage or excessive wear before storage.

Professional Applications

  • Residential framing and construction projects
  • Commercial building construction and renovation
  • Electrical and plumbing rough-in work
  • HVAC installation and ductwork routing
  • General contractor drilling operations
  • Maintenance and repair applications
  • Professional carpentry and millwork

Why Choose Greenlee Quality?

Greenlee Nail Eater� bits represent professional-grade drilling solutions backed by patented technology and heat-treated steel construction. The unique cutting angle design and self-feeding screw point deliver reliable performance in extreme drilling conditions, while the ability to cut through nails eliminates common work interruptions. With 30% longer life span and super tough construction, these bits provide exceptional value for professional contractors and serious DIY applications.

Manufacturer Resources

Product Specs

Product Type:
Extreme
Country Of Origin:
China
Department:
Electrical
Shank Type:
Hexagonal
Product Material:
Heat Treated Steel
Overall Length:
18.000 IN (457.200 MM)
Twist Length:
15.000 IN (381.000 MM)
Shank Diameter:
7/16 IN (11.100 MM)
Product Subgroup:
Hole Saws & Bits

Greenlee 66PT-5/8 – Frequently Asked Questions

1) Will the Greenlee Nail Eater Extreme auger bit fit my cordless drill chuck?
The shank is a 7/16 inch hexagonal shank, so it seats in an impact wrench or impact driver with a 7/16 hex opening, and it also clamps in a standard 1/2 inch keyed or keyless drill chuck. The hex flats are what keep it from spinning in the chuck under load once you hit a nail.
2) How deep can I actually bore with an 18 inch Nail Eater auger bit?
Overall length is 18 inches, but only 15 inches of that is flute (twist length). The remainder is shank, so plan on roughly 15 inches of usable hole depth before the shank bottoms out in the hole. That is enough to pass through several abutting 2x4 studs in a row for a cable or pipe run.
3) Can this auger bit really drill through a nail without wrecking the bit?
Yes. The Nail Eater Extreme is built for it, heat treated steel with a patented cutting angle that lets the cutting edges chew through nails you hit mid-stud instead of stalling or stripping the lead screw. Greenlee rates the improved cutting edge at 30 percent longer life than a standard bit. It is still a wood bit, so treat nail hits as occasional obstructions, not a steady diet.
4) What sizes does the Greenlee 66PT Nail Eater Extreme auger bit come in?
Two diameters: 5/8 inch (part number 66PT-5/8) and 3/4 inch (66PT-3/4). Electricians typically use 5/8 for single NM cable runs and 3/4 where more than one cable shares the hole or where a larger conduit or tubing needs to pass.
5) Should I use a self-feeding auger bit or a hole saw for boring studs?
For rough-in through framing, the auger wins. The self-feeding screw point pulls the bit through the wood on its own so you are not leaning on the drill, and the long flute clears chips out of a deep hole. A hole saw has no lead screw, plugs with a wood core, and has nowhere near 15 inches of cutting depth. Keep hole saws for large-diameter openings in thin material and panels.
6) Why does my drill want to twist out of my hands with this bit, and how do I run it?
That is the self-feeding screw point doing its job, it grabs and advances fast. Start at low speed and let the point bite, keep the bit perpendicular to the face of the stud, and hold the drill with both hands or use the side handle. Back out periodically on deep holes to clear chips from the 15 inch flute.
7) Is the Greenlee Nail Eater Extreme suitable for commercial electrical rough-in, or is it a homeowner bit?
It is a production bit for trades. Greenlee lists it for electrical and plumbing rough-in, HVAC routing, and residential and commercial framing work, and the heat treated steel plus nail-cutting edge geometry are there because remodel framing is full of embedded fasteners. A crew stocking one diameter for cable runs usually standardizes on the 5/8 and keeps 3/4 on the truck for multi-cable holes.
How fast can I get the Greenlee 66PT-5/8 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 66PT-5/8 come with a warranty?
Absolutely. The Greenlee 66PT-5/8 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 66PT-5/8?
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 66PT-5/8 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.
!