Holey-Moley Fence Post Core Digger


  •  4″, 5″, 6″ diameters available
  • Works in Hard Clay, Hard Soils, and Moist Soils. Does not work well in Sticky Clay.
  • Digger is complete, ready to use.
  • Standard Core Tube Length – 12-inches (custom lengths available)
  • Digs holes up to 4-1/2 feet (54 -inches) deep
  • All Blades are Replaceable
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The Holey-Moley Post Hole Core Digger: A Comprehensive Overview

As a result of innovative tool design the Holey-Moley Fence Post Core Digger is efficient for fence post hole digging, aided by the power of a standard shop vacuum. Because of its vacuum assisted design, this tool is particularly effective in various soil conditions like hardpan, hard-packed clay, both dry and wet conditions, and most uniform soils having binding characteristics.

Holey-Moley Core Digger Assembly

Holey-Moley Post Hole Core Digger Method of Operation

The primary function of the Holey-Moley Core Digger is to dig a narrow ring around a central plug. A shop vacuum creates nearly 80 pounds of pull down force on the cutter head, enabling easy ground penetration. Once the digger reaches a cut depth of 12 inches, the plug is held within the digger head with the vacuum.

After removal of the core digger, one can switch the vacuum hose from suction to the blower function to expel the plug.  By simply turning off the vacuum the aerated soil plug may simply fall out.

The Post Hole Core Digger Quick Change Heads

The photo below shows three Quick Change Head sizes, 4″, 5″ and 6″.  All you need is one complete Digger Assembly with Handle and then you can then use from any of the many Quick Change Heads to increase your digging options.

Holey-Moley Fence Post Hole Core Digger Universal Kit.

The core digger operates at a rate of 2 to 15 inches a minute, depending on the soil type. It can bore precision holes up to 4.5 feet deep and is available in diameters of 4, 5, and 6 inches. Extensions for the vacuum tube, available in lengths of 14, 28, 36, and 48 inches, facilitate deeper digging.

This digger is versatile, capable of cutting through large tree roots, and can also cut through electrical conduits, metal water pipes, PVC pipes, and communication cables. Therefore, it is strongly recommended to call 811 before you start digging.

Holey-Moley Post Hole Core Digger Assembly


The Holey-Moley Core Digger assembly comprises three parts: the handle assembly, the upper vacuum tube, and a quick change head. The digger head is made of heavy-gauge metal pipe with a replaceable hardened metal blade.

Replaceable Blades for the Post Hole Core Digger

Holey-Moley Core Digger Replacement Blade


Additionally accessories include a Fence Post Hole Reamer which is available in 8-inch and 10 and 12-inch diameters. Because of engineering design, the reamers’ outside diameter is ideal for concrete tubes. In addition, after the digging process, the shop vacuum can be used to clean the bottom of the hole and surrounding area of loose dirt, keeping your workspace tidy.

Lastly, the Holey-Moley Core Digger is not only efficient and easy to use, but it also turns the laborious task of digging holes into a simple, even enjoyable process.

YouTube Videos

6 Inch Holey-Moley Post Hole Core Digger


6 Inch Holey-Moley Post Hole Core Digger in Wet Sandy Clay – St. George, UT


Other links you may enjoy:

Quality Manufacturing

Because quality is most important, 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 also 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 N/A
Dimensions N/A
Post Hole Core Digger Assembly

4-inch SKU 1-91-1104-12, 5-inch SKU 1-91-1105-12, 6-inch SKU 1-91-1106-12


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