Holey-Moley Post Hole Digger


4″, 5″, 6″ diameters

Note: 4-1/2″ no longer available

  • 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
  • Use 4-inch for round posts
  • Use 5-inch for 4×4 posts to get a tight fit, no concrete required
  • Use 6-inch 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.
  • Works well with our Portable Engine Driven Shop Vacuum System (HVS). Comes with 7 feet of 2-½” hose.
Got a question?  Give us a call – 702-533-4363

Back Orders – Allow an additional 2 weeks.  Call to check status.  Sales are based on 1st-in, 1st-out.

Choose Assy or Quick Change Head size

Clear selection


Holey-Moley Post Hole Digger

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

The shop vacuum assisted 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.

Compact Kit

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

Holey-Moley Post Hole Digger
4-inch Holey-Moley Fence Post Hole Digger Kit


Fence Post Hole Digger Method of Operation

The Fence 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. The vacuum 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.

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

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 Post Hole Digger can change from a 4 inch digger to a 5-inch or 6 inch digger. See all our Quick Change Heads.

Post Hole Digger Quick Change Head
Post Hole Digger Quick Change Head


Buy one digger, save with Quick Change Heads

There is a whole family of 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.

Post Hole Digger Quick Change Heads
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

If you need to operate in a remote area without electricity,  we offer a Portable Engine Driven Shop Vacuum System.   This system is especially relevant because of its light weight and because it ail run all day on one tank of gas. In addition, the Fence Post Hole Digger works exceptionally well with the Portable Engine Driven Shop Vacuum System, because no other tools are required.

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  1.75 million views


4-1/2″ Holey-Moley Fence Post Hole Digger Time-Lapse Video 1:49   2.06K views

Quality Manufacturing

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

For More Information

We’re here to help

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


For more information give us a call, text,  or send us an Email.


Additional information

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

4-inch Complete Assy, 5-inch Complete Assy, 6-inch Complete Assy, 4-inch Quick Change Head, 5-inch Quick Change Head, 6-inch Quick Change Head


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