Dewalt Guide Rail Square Adapter - DIY Kit

From $30.99

Optional Support Tab: Choose an option

Choose an option
No Support Tab
Add Support Tab

This product is currently out of stock and unavailable.

Notify me when this product is in stock

Order in the next [totalHours] hours %M minutes to get it between and
Availability: In stock Pre order Out of stock
Rafter Square not included! To use this kit you will need to purchase a 12" Empire Rafter Square (Model #3990 or Model #E3992)

This will only work with the Dewalt guide rails!

Dewalt Guide Rail Square Kit

Feature Overview

We worked with engineer Jeff Wagner to bring his rail square idea to market. The goal of this rail square adapter was to be an affordable option that will still produce accurate 90/45 degree alignment.

This is designed to work with Dewalt Guide Rails.

Our guide rail square uses the accuracy of the 90/45 degree sides on the aluminum rafter squares to achieve a true 90 and 45 degree angle. We are able to keep the costs down by using a 3D printed cam lock mechanism to secure the square against the rail. There are a total of 4 cam locks, 2 on each side so that you can use the square on either side of the guide rail.

  • The guide rail square creates accurate 90 and 45 degree alignment
  • The guide rail square can be used on either end of the guide rail
  • Strong cam locking system to ensure snug fit to rail
  • Optional Support Tab to keep the rail square flush to your workpiece

Accurate Alignment

Our guide rail square adapter uses the accuracy of an Empire square and the guide rail to achieve accurate 90 degree and 45 degree alignment. The kit installs onto an Empire square within a few minutes. It uses a cam lock system to press the Empire square to the guide rail t-track, achieving a true 90 degree.

90° and 45° Alignment

The guide rail square adapter can be flipped around and used on both sides. This means that you can set up a 90 degree cut or 45 degree on the close side of your workpiece. You can also install the guide rail square on the far side of the guide rail on the opposite side of the work piece.

Optional Support Tab

The Empire square is 12" long, which means towards the end there will be minimal sagging due to the weight. This is common on all guide rail squares. We provide an optional support tab which will let the guide rail square and guide rail sit flush onto the workpiece.

Technical Details

  • Weight: 6 oz (excluding rafter square)
  • Material: HTPLA plastic
  • Compatible Guide RailsDewalt and Powertec (Dewalt Clone)
  • Compatible Rafter Squares: Empire #3990 and Empire #E3992

What's Included?

  • (2) Installation Brackets
  • (4) Cam Locks
  • (2) Countersunk Screws
  • (2) Nylon Hex Lock Nuts

What's Included: Optional Support Tab?

  • (2) Installation Support Tab Brackets
  • (2) Support Tabs
  • (1) Countersunk Screws
  • (1) Nylon Hex Lock Nuts

    Customer Reviews

    Based on 25 reviews

    Love this product. Quality parts for a much more inexpensive option to the TSO guide rail. Only issue I have is the amount of track that becomes unusable with this clamped on. Nothing to do with the quality of the product though, but the nature of implementation. If you have more than just the one 55 inch track though it’s negligible. I was an idiot and originally bought the blue empire square. Not sure how I missed that the printed parts are colored to match the brand. These Makita green/blue colored printed parts with a silver square look like a natural companion to the Makita track. So, I went back to HD to buy the silver one. What a dope. Anyway, if you want a guide rail square and don’t want to spend upwards of $200 this is a fantastic option.


    Solid attachment. Wasn’t sure about this at first, but once attached properly, it feels really solid and squares up really nicely.


    A more affordable option than any other on the market. While easy to get the recommended square from a Home Depot, having a kit with it included would be a nice option.

    Bruce Petersen
    This met my needs exactly!

    I break down my sheet goods using my track saw before final sizing on my table saw. I needed a quick way to crosscut square without a lot of measuring. This was perfect and at a perfect price. Works great. It’s squareness is obviously dependent on the squareness of your framing square but that’s easy to get. This is a great product at a very reasonable price! Would recommend.

    Rudolph Schneider

    Kreg ACS Guide Rail Square Adapter - DIY Kit