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Duckbill 138-DB1 5/16" x 5 ft Earth Anchor - 5000 lbs Capacity

Duckbill 138-DB1 5/16" x 5 ft Earth Anchor - 5000 lbs CapacityDuckbill 138-DB1 5/16" x 5 ft Earth Anchor - 5000 lbs CapacityDuckbill 138-DB1 5/16" x 5 ft Earth Anchor - 5000 lbs CapacityDuckbill 138-DB1 5/16" x 5 ft Earth Anchor - 5000 lbs Capacity
SKU: MCP-F830057MPN: F830057

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QuantityCost per AnchorSave
1 - 11$48.79-
12 + $46.365%
  • USUALLY SHIPS: 1 - 2 Days
  • Made in the United States of America!

Product Description

  • Works like a toggle bolt in soil
  • Driven into the ground (with no holes, no digging and no concrete), providing a safe and environmentally sensitive installation
  • An upward pull on the anchor tendon rotates the Duckbill into a perpendicular "anchor lock" position in undisturbed soil
  • Results in superb holding capacities
  • A very effective, lightweight and economical solution to any anchoring application, large or small
  • A favorite for our arborist customers, great for anchoring and supporting trees
  • Working Load Limit (WLL) shown indicates holding power in normal soil
  • Breaking Strength shown indicates the maximum tensile strength of the included wire rope

* Capacities shown apply only to normal soil conditions.


5/16" x 5 ft
WLL (lbs)
Breaking Strength (lbs)
Box / Case Quantity
Weight (lbs)

Questions & Answers

7 Questions & 7 Answers
from New Mexico asked:
December 23, 2021
If you pull up on the cable to set or lock in the anchor, then that puts slack in the cable, what do you use to tie down with that removes the slack? Also I dont understand the size. If Im anchoring a small trailer is this an anchor I should use?
1 Answer
Unfortunately we can't help you pick the right size of anchor, we can only give you the strength ratings (as published on the site) and you can choose accordingly. Essentially you drive the anchor into the ground, then pull on the cable to set the toggle deep in the soil. This should not results in much slack.
Submitted by: WRS on December 27, 2021

from Santa Cruz Mountains, CA asked:
September 5, 2020
What diameter and length driving rod is needed for a duckbill anchor DB-138?

1 Answer

The mfg. recommends using "Power Drive Steel" (essentially a jackhammer with special tooling). This makes the job easier, of course, but also ore expensive. We also have many customers that have used the 3/4" x 48" Steel Drive Rod.

Submitted by: WRS on September 6, 2020

from Sarasota, FL asked:
June 6, 2020
The video say also for temporary use but how would you ever get it back out of the ground to reuse it?
1 Answer
It would require digging for certain. Perhaps they're suggesting you can use these and simply leave in place when you're done. For example, if you have an event that you set up for annually.
Submitted by: WRS on June 8, 2020

from Henderson, NV asked:
May 19, 2020
What are the proper depths to anchor based on the ASTM D-2487/2488 soil classes 1 thru 5? Also what is the WLL for each soil class?
1 Answer
The manufacturer has stated that the recommended installation depth is 5ft (approximately) so that only the eye and a few inches of cable are exposed. For soil capacities, please see the attachment.
Submitted by: WRS on June 8, 2020

from Lopez Island, WA asked:
February 26, 2020
What is the required depth you need to drive a 138 DB1 to achieve the 5000 lb WLL?
1 Answer
This is dependent on the soils the anchor is being installed into. A minimum installation depth of 60 prior to locking the anchor should be used.
Submitted by: WRS on February 26, 2020

from Millersville, MD asked:
August 26, 2019
Are your Duckbill anchors made of aluminum or galvanized steel and are you able to supply 88-DB-II? Do they come already wired and clamped for faster installation?
1 Answer
The heads are aluminum, and we do offer them with galvanized cable assemblies pre-installed. You can view the 88 (1/4") size here.
Submitted by: WRS on August 27, 2019

from Cohasset, MA asked:
March 6, 2018
How do I install this anchor?
1 Answer
The easiest way to explain this is to point you to Duckbill's installation video, which you can see by clicking here. This video is also shown on the "Video" tab on this item's page.
Submitted by: Westech Rigging Supply on March 6, 2018

Product Reviews

1 Reviews
100% (1)
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100% Recommend this product (1 of 1 responses)
By Wade
Rural Minnesota
Went Through the Roots
May 8, 2020
Seems well made. Drove it in with a electric hammer with ease only hitting a couple tough spots. Seems to be holding well so far as a dead man for a amateur antenna array tower guy post. Used because of close proximity to a large tree and could not auger a hole through the roots. Working well so far.
  • Well built. Went where I needed it to go. Great value!
  • None so far.



Safety Notice

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Although Westech Rigging Supply strives to manufacture and sell the highest quality rigging and safety gear, use of the gear is dangerous if not used correctly by competent trained professionals. Westech Rigging Supply disclaims any liability resulting from the misuse of its rigging and safety gear. Please take a moment to more thoroughly review our disclaimer.

Westech Rigging Supply rigging and safety gear is only intended to be used by competent trained professionals. Misuse of the rigging and safety gear can result in serious injury up to and including loss of life. As such, Westech Rigging Supply disclaims liability for any misuse or incorrect product selection by our customers.

Rigging and safety gear purchased from Westech Rigging Supply should be used in strict accordance with all industry and OSHA standards. At no time should rigging or safety gear be used beyond its certified load ratings (aka Working Load Limits). Normal wear and tear should be expected with use of rigging and safety gear; therefore, all gear should be thoroughly inspected before each and every use. Worn or unsafe rigging and safety gear should never be used.