Holey-Moley Post Hole Digger


3-1/2″, 4″, 5″, 6″ diameters

NEW: 3-1/2″ for signs and railings

  • Works well in dry soils, soils with gravel and soils with some moisture. Does not work well in wet ground or wet clay.
  • Components are complete, ready to use
  • Digs holes up to 4-1/2 feet (54 inches) deep
  • The 3-1/2-inch is good for signs and railings
  • The 4-inch is good for round posts
  • Use 5-inch for 4×4 posts to get a tight fit, no concrete required
  • 6-inch digger is best for 4 x 4 posts with concrete
  • Works with Shop Vacuums (recommended 12 amps, 180 to 200 CFM, typically sold as 6.5HP).   We recommend that you use your own shop vacuum first before buying a new one.
  • Uses a 2-½” vacuum hose, standard with most large shop vacuum.
Got a question?  Give us a call – 702-533-4363

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Holey-Moley Post Hole Digger

The Holey-Moley Fence Post Hole Digger is another Holey-Moley Shop-Vac assisted digging tool. As a result of engineering design, unlike a post hole auger, this Digger operates with most standard shop vacuums.  In addition, the Digger easily bores precision holes to 4.5 feet deep. Depths of 20 feet are attainable with Vacuum Extension Tubes. Digger heads for 3-1/2″, 4″, 5″ and 6″ diameters are available.

The shop vacuum assisted fence post digger will rapidly dig deep, straight, uniform holes. It will dig at a rate of 2 to 15 inches a minute depending on your soil type and hole diameter. In addition, unlike a post hole auger, this digger has the capability to easily dig holes 20 feet deep.

Caution: This digger will cut through electrical conduit, metal water pipes, PVC pipes, and communication cables.  Call 811 in your state first before digging.

Compact Kit

The Fence Post Hole Digger is easy to take apart and best of all it fits into a small space.

4-inch Holey-Moley Post Hole Digger Kit


Holey-Moley Post Hole Digger Method of Operation

The Holey-Moley Post Hole Digger is a vacuum assisted, manually operated hole-boring tool.  It operates in loose to hard packed soils.  This tool works well in soils with gravel or small rocks and in hardpan. in addition to hard packed clay soils, loose soils and soils with up to 50% moisture are easy to penetrate. This digger is not recommended for wet soils or wet clay. As a result of excellent engineering the Digger  is easy to operate. Therefore , it only requires an easy back-and-forth rotational movement to loosen the soil. The unique design results in your shop vacuum doing the hard work. Also, unlike a post hole auger that leaves a lot of soil around the hole, the shop vac removes the soil from the hole while digging.  The vacuum also works well for cleaning up the bottom of the hole when digging is complete.

Quick Change Heads

The Holey-Moley Post Hole Digger Quick Change Head design allows for easy change-out of different heads.   As a result, with just two bolts a Fence Post Hole Digger can change from a 4 inch digger to a 5-inch or 6 inch digger. See all our Quick Change Heads.

Holey-Moley Post Hole Digger Quick Change Head


Buy one digger, save with Quick Change Heads

There is a whole family of Post Hole Digger Quick Change Heads including Post Hole Diggers, Core Diggers, and Reamers.  You can save a lot by purchasing one digger assembly and then just buy the quick change heads for your other hole digging needs.

Holey-Moley Post Hole Digger Quick Change Heads


Replaceable Blades

The Holey-Moley Post Hole Digger heads and saw blades have been designed to be replaceable.  The 4-inch, 5-inch, and 6-inch Replaceable Digger Heads are also interchangeable. Especially relevant is the blades attach to the standard lower vacuum tube universal adapter with 4 bolts.

Holey Moley Post Hole Digger Replacement Blades and Heads

Vacuum Extension Tubes

Vacuum Tube Extensions are also available in 14″, 28″, 36″ and 48″ lengths. Custom lengths available on request.  The extensions can be used to extend digging depths to more than 15 feet.

Vacuum Tube Extension
Vacuum Tube Extensions for Post Hole Diggers, Core Diggers and Reamers

Holey-Moley Post Hole Digger is easy to operate

The easily assembled parts when hooked up to a standard shop vacuum cleaner become a robust, simple to use, hole-boring machine. When finished the digger will look like the fully assembled digger in the product gallery. You will need a Shop Vacuum described in our section on Selecting a Shop Vacuum. We also have a blog on Digging Holes With A Shop Vac.

Remote Operation

Another noteworthy option for digging holes in remote locations is our Makita Gasoline Powered Vacuum Filter Bucket. The Portable Engine Driven Shop Vacuum System works exceptionally well with the Holey-Moley Post Hole Diggers.  This is the best vacuum filter bucket available.

Makita 4 cycle engine powered vacuum, vacuum filter bucket 7 gal. Uses Ridgid Vacuum filters.

Need a Larger Diameter Hole?

We also carry reamers for 8-inch, 10-inch, and 12-inch diameter holes.  These reamers require a 6-inch pilot hole.

YouTube Videos

Super Fast Holey-Moley Fence Post Hole Digger – 8:41  2.1 million views


4-1/2″ Holey-Moley Fence Post Hole Digger Time-Lapse Video 1:49   3.06K views

Other links you may enjoy:

Quality Manufacturing

Our distributor and manufacturer is Keene Engineering , manufacturer of gold dredging equipment, in Chatsworth, CA for over 70 years.

Made in the USA

Cat 6 Tools is proud to manufacture most if its products in the USA.

Cat 6 Tools, attaches this sticker to products that are patented and made in the USA.

We’re here to help

Contact us at:

Cat 6 Tools, LLC
Cat 6 Tools, LLC
Henderson, NV

Additional information

Weight 16.0 lbs
Dimensions 36 × 9 × 9 in
Post Hole Digger

3-1/2-inch Complete Assy, 4-inch Complete Assy, 5-inch Complete Assy, 6-inch Complete Assy


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