Greenlee Nail Eater� 5/8" x 18...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$110.87
$53.26
Greenlee 66PT-5/8 5/8 x 18 Nail Eater® Bit

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

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Model: 66PT-5/8
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$110.87
$53.26
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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

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)

Greenlee 66PT-5/8 – Frequently Asked Questions

1) How deep can a 5/8 x 18 Nail Eater bit actually drill through framing?
Overall length is 18 inches with 15 inches of that being twist, so the usable cutting depth is the 15 inch flute length, less whatever the screw point and chuck engagement take up. That's enough to bore through several abutting 2x4s in a stud pack or a doubled top plate and still clear chips.
2) What happens if I hit a nail or a joist hanger screw while drilling?
That's what the Nail Eater line is built for. The heat-treated steel cutting edges are made to cut through nails encountered mid-bore rather than stalling or chipping out, so a remodel bore through a hidden fastener doesn't end the bit. It isn't a demolition bit though, embedded structural steel or hardened lag bolts are a different job.
3) Is a 5/8 inch hole big enough for the cable I'm running?
The bit cuts a 5/8 inch (15.9 mm) hole, which is the common rough-in size electricians use for pulling romex through studs and plates. If you're pulling larger bundles, conduit, or plumbing supply lines, step up to a bigger diameter, this one is sized for standard framing penetrations.
4) Do I need to push hard on this bit, or does it pull itself through?
It feeds itself. The screw point at the tip threads into the wood and draws the bit forward, so you start at low speed, let the point bite, and then just steady the drill. Leaning on it fights the feed. One thing to plan for: a self-feeding point in a high-torque right angle drill will try to twist the tool out of your hands if the bit binds, so keep a firm grip and use the side handle.
5) What model number do I order for the Greenlee 5/8 inch Nail Eater auger?
Order Greenlee 66PT-5/8. That's the 5/8 inch diameter by 18 inch Nail Eater Extreme auger with the 7/16 hex shank. The 66PT prefix is the Nail Eater Extreme series, and the fraction on the end is the bore diameter, so the same series covers other diameters under matching part numbers.
6) What does the Greenlee Extreme version of the Nail Eater give me over a standard auger bit?
Two things: the patented cutting angle, which starts smoother and lowers the cutting load so the drill bogs down less in dense or doubled framing, and the improved cutting edge that Greenlee rates at 30 percent longer life than a standard bit. Both matter most if you're boring hundreds of holes a day rather than a handful.
7) How much does the 66PT-5/8 auger bit weigh for a tool kit or shipping count?
It comes in at 0.8 lb (363 g) per bit. Light enough that a full set of diameters adds little to a rough-in bag, which matters when a crew is carrying bits up a ladder all day.
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?
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