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Gibraltar Mailboxes

Model # SDPK0000

Internet # 100656398

Store SKU # 398674

Steel Drive-In Post Kit in Black

This item has been discontinued.
The Home Depot no longer carries this specific product.

$34.97 /each


Model # SDPK0000

Internet # 100656398

Store SKU # 398674

Store SO SKU # 782130

The Steel Drive-In Post Kit is constructed from heavy duty galvanized steel and features a black powder coat finish for durability and lasting beauty. This mailbox post has an adjustable mailbox support arm so you can find the ideal height for your mailbox box and install the unit with ease. The post is compatible with standard and large size mailboxes and comes with mailbox mounting hardware and instructions. No digging or concreting is required for installation.

  • Constructed from heavy duty galvanized steel
  • Compatible with standard and large size mailboxes
  • Features a black powder coat finish
  • Features an adjustable support arm that can be altered to the desired height
  • No digging or concreting is required
  • Includes mailbox mounting hardware and assembly instructions
  • Easy installation

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Accessory Type 
Post material 
Product Weight (lb.) 
10.1 lb 
Rear access 
Warranty / Certifications
Manufacturer Warranty 
90 Day Limited Warranty 


Rated 3.2 out of 5 by 12 reviewers.
Rated 2.0 out of 5.0 by In New England, you'll have to dig a hole first I bought this about 2 years ago. There's no way it will go through rocky New England soil by itself. We had to dig a hole. That's almost to be expected but now after 2 years I just noticed that the clamp holding the support arm has rusted through. The support arm is hanging by a thread and I actually had to jury rig it with...wait for it...duct tape. I've been trying to find a replacement for just the support arm and clamp but I can't find anything. Putting in another post in the middle of winter is not going to be feasible. I just hope the duct tape will hold until the Spring. December 24, 2013
Rated 1.0 out of 5.0 by Don't buy it. Having read other reviews we didn't try to drive it in, but set it in concrete. When completed. the mailbox was very low. We tried to install the large size Gibraltar mailbox according to the instructions that came with the post, but the holes did not line up. We had to drill new holes. I would expect that a company that makes mailboxes and posts would try to make certain that the installation instructions would work for their products, and just try to follow them once to be sure.. Also would expect that they knew basic USPS guidelines for curbside mailboxes. The post is sturdy and good looking, just LOW. June 9, 2014
Rated 5.0 out of 5.0 by down but not out my gibralter heavy duty black mailbox and gibralter heavy duty drive tn post was hit by a car and survived ., even after a 30 mph collision only the post base was damaged the same mailbox still sits and looks great in front of my home. thank you for a superior box and post. September 29, 2010
Rated 3.0 out of 5.0 by How low must it go? The "No Concrete Needed" steel post kit requires an install depth of 18" according to the instructions. All you need is a rubber mallet the instructions read. It popped out at 18", 22", 24" and 28". This kit does require some form of anchor especially if you are going to use a standard or large sized mail box. The other down side is the mounting bracket situation. I bought a large Gibralter box to set atop the post. None of the holes aligned and the weight (especially after the addition of packages) was to much for the post. I am downsizing to a smaller mailbox in hopes that it alleviates the alignment and weight issues. I should also add that the mounting plates sold in store of the same brand are meant for traditional post mounts and not the extended flat arm on this item. I learned the hard way. May 3, 2014
Rated 1.0 out of 5.0 by Not Good At All This "Poor" Product lasted only 3 months. My neighbor accidentally hit it pulling into the driveway, not hurting the mailbox, but "Breaking" what apears to be a flimsy support arm. The metal arm that attached to the post seemed to tear like a piece of Aluminum Foil. I'm NOT impressed. Better buy something sturdy for sure. This wouldn't even make it through a mean little 10 year old kid. January 4, 2009
Rated 2.0 out of 5.0 by Mangled after drive-in The product simply isn't strong enough to be driven into soil. I suppose if your yard has the consistency of Jello, it'll be fine, but both the end being driven in and the end I was pounding on ended up being severely bent. I couldn't actually attach the upper half without pounding the metal back into some kind of shape (it never sat straight). Minor poinding to connect the top half to the bottom half also bent that piece, so the end cap didn't go on. All of this despite soaking the yard pre-drive in to soften the soil. I'm going to have to rip it out because it still isn't solid into the ground. I'd recommend you dig a hole or use a stronger product. June 2, 2013
Rated 4.0 out of 5.0 by Hollow Steel Post Nice look when installed, but in caliche soil, I recommend a Post Hole digger - do not pound in, I'm sure it will buckle. While the concrete was setting, I filled the post with the leftover concrete & let it set. Now, that post isn't going anywhere! Easy attach mailbox arm, & solid installation of braces will ensure the box won't fall off, and will be hard to steal. Nice, glossy black color should last for years, but I have some touch-up paint for the Camaro I can use, if it begins to chip off. May 14, 2014
Rated 2.0 out of 5.0 by Be careful before you buy this product! I am very dissatisfied with this mailbox post as it does not work well with the Yorkshire Mailbox I also purchased. I suspect this mailbox post will also not work well with other high quality mailboxes. Two problems: 1) The mounting assembly was not compatible with the Yorkshire mailbox. I suspect this problem exists with all mailboxes that do not have mounting screws along the bottom of the sides. 2) The arm which attaches to the post is very flimsy. The Yorkshire mailbox is heavy, which results in the arm drooping in general and jiggling when the mailbox is opened and closed. I plan to purchase a different mailbox post soon. Unfortunately I already set this one in the ground with concrete!!! December 13, 2009
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