Greenlee 7/8 x 18 Nail Eater E...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$132.30
$57.36
Greenlee 66PT-7/8 7/8 x 18 Nail Eater Bit

Greenlee 7/8 x 18 Nail Eater Extreme Auger Bit with Self-Feeding Screw Point

(No reviews yet) Write a Review

Model: 66PT-7/8
Selected Model is

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

$132.30
$57.36
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 7/8 x 18 Nail Eater Extreme Auger Bit with Self-Feeding Screw Point

Professional drilling performance with patented nail-cutting technology

The Greenlee 7/8 x 18 Nail Eater Extreme Auger Bit delivers professional drilling performance with patented nail-cutting technology and self-feeding screw point design. Constructed from heat-treated steel with a hexagonal shank, this extreme-duty bit provides reliable performance for demanding drilling applications where encountering nails is expected.

Professional Features & Benefits

  • 7/8 IN diameter with 18 IN overall length: Provides substantial drilling capacity for heavy-duty applications while maintaining precision control.
  • Patented nail-cutting design: Cuts through nails cleanly without damaging the bit, extending service life and reducing downtime.
  • Self-feeding screw point: Draws the bit through wood automatically, reducing operator fatigue and ensuring consistent feed rates.
  • Heat-treated steel construction: Delivers superior durability and edge retention for extended service life in demanding conditions.
  • Hexagonal shank design: Provides secure chuck engagement and prevents slipping during high-torque drilling operations.
  • Improved cutting edge technology: Delivers 30% longer life span compared to standard bits through advanced metallurgy and geometry.
  • Extreme product classification: Engineered for the most demanding professional drilling applications where standard bits fail.

Technical Specifications

  • Bit Diameter: 7/8 IN (22.200 MM)
  • Country Of Origin: China
  • Overall Length: 18.000 IN (457.200 MM)
  • Product Material: Heat Treated Steel
  • Product Type: Extreme
  • Product Weight: 1.500 LB (681.000 GM)
  • Shank Diameter: 7/16 IN (11.100 MM)
  • Shank Type: Hexagonal
  • 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 perpendicular to the work surface and align the self-feeding screw point with the desired drilling location.
  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 while allowing the self-feeding design to control the feed rate through the material.
  5. Continue drilling through nails and wood without stopping, utilizing the patented nail-cutting capability.
  6. Complete the hole and withdraw the bit while the drill is still running to clear debris from the flutes.

Professional Applications

  • Renovation and remodeling projects where nails are encountered
  • Electrical and plumbing rough-in work
  • Structural drilling in existing construction
  • Emergency repair and maintenance operations
  • Professional carpentry and millwork
  • Industrial maintenance and facility management

Why Choose Greenlee Quality?

Greenlee delivers professional-grade drilling solutions with heat-treated steel construction and patented nail-cutting technology. The extreme product classification and improved cutting edge design provide 30% longer life span, ensuring reliable performance and value for demanding professional applications.

Manufacturer Resources

Product Specs

Bit Diameter:
7/8 IN (22.200 MM)
Country Of Origin:
China
Overall Length:
18.000 IN (457.200 MM)
Product Material:
Heat Treated Steel
Product Type:
Extreme
Product Weight:
1.500 LB (681.000 GM)
Shank Diameter:
7/16 IN (11.100 MM)
Shank Type:
Hexagonal
Twist Length:
15.000 IN (381.000 MM)

Greenlee 66PT-7/8 – Frequently Asked Questions

1) How deep can the Greenlee 66PT-7/8 auger bit actually bore?
Overall length is 18 inches with 15 inches of that being twist, so usable boring depth is governed by the 15 inch flute length, not the full 18. That clears a doubled 2x top plate or a stacked header easily and lets you reach through a stud bay from an awkward angle. For boring straight through a single 2x4 or 2x6 plate you have far more length than you need, which is useful when the drill body will not sit square to the work.
2) Can I run this bit through nails in old framing without wrecking it?
That is what the Nail Eater Extreme is built for. It uses a patented nail-cutting design that cuts through nails cleanly without damaging the bit, so on remodel work you keep drilling instead of stopping to back out and reposition. The cutting edge is rated for 30 percent longer life than standard bits. Keep the drill running as you withdraw so the flutes clear the chips and any nail fragments.
3) Should I start this auger bit at high speed or low?
Start slow. The self-feeding screw point has to bite before the cutters engage, so low speed at the start lets the point thread into the wood and pull the bit in on its own. Once it is feeding, hold steady pressure and let the screw control the rate rather than leaning on the drill. Because the point pulls hard, use a drill with a side handle or a clutch, since a sudden stop on a nail transfers that torque straight to your wrists.
4) What part number do I order for the 7/8 inch Nail Eater Extreme?
Greenlee 66PT-7/8 is the manufacturer part number for the 7/8 inch by 18 inch Nail Eater Extreme auger bit. The bit ships as a single piece with the screw point and hex shank integral, so there is nothing separate to add to complete it.
5) Is a nail-cutting auger worth it over a standard wood auger for remodel work?
On new construction where the framing is clean, a standard auger is fine. The Nail Eater Extreme earns its place on renovation, retrofit, and structural drilling in existing buildings, where you cannot see what is buried in the stud. A standard auger's cutting edges chip or roll on a hidden nail and the bit is done; this one is designed to cut through and keep going. For MRO and emergency repair crews who cannot afford a stalled hole, that is the deciding difference.
6) What is the Greenlee Nail Eater Extreme made of, and how heavy is it?
Heat-treated steel throughout, which is what gives the cutting edges their retention when they meet embedded fasteners. The bit weighs 1.5 lb (681 g). At that weight and 18 inches of length, it is a two-hand tool on a right-angle drill rather than something you run one-handed overhead.
How fast can I get the Greenlee 66PT-7/8 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-7/8 come with a warranty?
Absolutely. The Greenlee 66PT-7/8 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-7/8?
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-7/8 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.
!