Model # 30182

Internet #203215009

Oz-Post T4-850 4 in. Square Wood Post Anchor


T4-850 4 in. Square Wood Post Anchor

$23.68 /piece

Frequently Bought Together

Product Overview

Oz-Post is one of the best ways to secure a wood post in the ground. Oz-Post are not only extremely fast to install but can also help prevent your wood post from premature rot that can occur with direct burial in the ground. Oz-Post can also protect the wood from damage from weed eaters when the top sleeve is left exposed above the surface of the ground.

  • Regardless of what you plan to build with Oz-Post you can be sure that your posts will be sturdy and long lasting for many years to come
  • Fits a true 3-1/2 in. x 3-1/2 in. square post (pressure treated
  • Hot dipped galvanized anchor
  • Suitable for contact with acq approved lumber




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Customer Questions & Answers

Sturdy enough for storms?

I am looking at building a light 6 foot fence (using wood poles, and supports, but primarily wire). I want to use these since the fence would ideally be temporary, having used these do you feel that they would be sturdy enough to hold up the fence in New England weather? Please only respond if you have purchased and used this item. Thank you!
Asked by: NewEnglander
I live in Kern County, Ca.. We get some good strong winds. I have used these years ago and they still look great.
Answered by: PatMac
Date published: 2017-02-17

can this be used for small pergola posts?

Asked by: john
As long as your posts fit the dimensions of the base.
Answered by: Trebor
Date published: 2016-11-08

can these be used to go thru asphault

Asked by: ken
You would probably need an auger to drill through the surface of the asphalt first.
Answered by: Trebor
Date published: 2016-11-08

Will this work for the 4x4wood post that a plastic mailbox slips over?

Asked by: MailboxPost
Yes. This is what I did.
Answered by: Trebor
Date published: 2016-12-31
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Customer Reviews

T4-850 4 in. Square Wood Post Anchor is rated 4.8 out of 5 by 37.
Rated 5 out of 5 by from Easy By far the easiest way to put posts into the ground. Less than three minutes to drive one in the ground with an electric Jackhammer. If you mess up it is easy to pull out of the ground with a scissor jack. I built a 100 ft privacy fence using the OZ Post.
Date published: 2016-10-25
Rated 5 out of 5 by from It more than met my expectations and was glad that I found it through Home Depot. It more than met my expectations and was glad that I found it through Home Depot.
Date published: 2016-11-08
Rated 5 out of 5 by from Oz post anchor review Worked great. Easy to drive in the ground. You don't have to be a railroad worker type guy to drive it in the ground. Used a small sledge to get it to within a foot of the ground; then a big sledge to finish it. Recommend driving it into wet ground. Very solid when post is screwed into the holder.
Date published: 2016-08-03
Rated 5 out of 5 by from Masterful Completed fence in half a day. Rented jack hammer from HD and had posts set in 4 hours. The longest part of the project was calling 811. Saved $500 doing the fence myself. Awesome product. Digging holes and pouring concrete is stone-age-like compared to Oz-Post.
Date published: 2016-07-10
Rated 5 out of 5 by from Perfect for the job Very sturdy when installed. Only took about 10minutes eeach to drive in with a 8 pound sledge.
Date published: 2016-08-28
Rated 4 out of 5 by from Good Product! Interesting product solution! I was looking for something that would give me the versatility of changing out a rotted post and prolonging the life of treated posts by keeping away from environmental contacts. This seemed to fit the need, a jackhammer installation is definitely the way to go though! I came across a jackhammer deal at Harbor Freight, and thought the jackhammer install kit would work but it didn't. The hammer I bought had a 1&1/8" shank, but the internals were different so I ended up with a daily rental at Home Depot of a jackhammer. Install was easy, I started off with a 3lb sledge to start the posts individually and get them in line before using the jackhammer. They zipped in with the 35lb jackhammer, and some twisted a little but I was able to straighten them out using a 24" pipe wrench to make slight adjustments to posts that were out of alignment. I also used a few composite shims here and there to help with posts that were out of plumb. Overall, a pretty good install, not sure if you save a lot of time due to slight modifications that you make to each post, but definitely saves your back from lugging around concrete everywhere! Really looking forward to see how this product holds up over time and future maintenance ease! I installed 47 of these, so the Jackhammer Kit was well worth $30. I also painted my posts holders black, to give them a better look for my fence project!
Date published: 2016-05-31
Rated 5 out of 5 by from Top Notch Product! Stumbled across these checking on 4x4 pricing to replace an existing fence. Was a bit skeptical, thought them a tad pricey but after reading other reviews on the post anchor, I bought what I needed. I will never dig another hole to pour concrete to set a post ever again. As I said, I read others reviews & I knew what I needed to do going into the project. The biggest complaint I saw was that the 4x4 short posts used to drive the anchor into the ground split/spread making them difficult to remove. Simple fix- Take a 2x4 appx 3 3/4"x 3 3/4", trim xtra 1/8" off 2 sides, & drill hole in the middle of it to accommodate a screw. When installing the post anchor, drop the 2x4 into the bottom, use a standard "indoor" type 4x4 stub (is narrower than a treated 4x4) to drive the anchor into the ground & use the post anchor level. (The 2x4 acts as a buffer/cushion for your 4x4 stub so it don't split/spread inside the bracket. The 2x4 takes the abuse and is easily removed.) Once the post anchor is in the ground remove stub, hand twist a screw into the 2x4 to remove it then install 4x4 post. :) If you're able to use basic hand tools (sledge, drill, saw), these install within minutes and save hours of unnecessary labor.
Date published: 2016-05-10
Rated 5 out of 5 by from Great post solution Used three of these to install three bird houses in a well planted garden. No digging, no concrete. They are very stable in my clayey soil. One word of caution, don't use a piece of post to drive the stake in. After several whacks with the sledge it will get lodged and very difficult to remove. I used two pieces of 2x4.
Date published: 2015-10-20
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