TSO Products

Triangle to Guide Rail Adapter

(4 reviews) Write a Review
  • Use the Triangle to Guide Rail Adapter to Attach your PTR-18 or MTR-18 directly onto a Festool, Makita, Milwaukee, Kreg, RIDGID, WEN or Powertec guide rail.
  • Triangle to Guide Rail Adapter
  • Includes a specially made torpedo nut with keystone alignment feature.
  • Use the MTR-18 protractor to dial in a custom angle for track saw cutting.
  • Utilize your precision triangle as a large guide rail square for perfect 90 degree cuts.
  • Attach the triangle along its long edge for perfect 45 degree cuts.
  • Precision CNC milled, this adapter provides a solid connection to your guide rail.
  • Attached the adapter into the existing threaded pin holes along any side.
  • The triangle can be positioned at any length along your guide rail.
  • The Triangle Adapter provides a strong, rigid attachment to your guide rail.
  • The Triangle Adapter provides a convenient method to attach triangle to guide rail.


The Triangle Adapter is compatible with our MTR-18 and PTR-18 PLUS Precision Triangles, and works with guide rails from Festool, Makita, Milwaukee, Kreg, RIDGID, WEN and Powertec.
See how our Triangle Adapter connects to your guide rail.
Watch this video to see how quick and easy it is to connect a large precision triangle to a guide rail with our Triangle Adapter.

Transforms Precision Triangle Into Large, Adjustable Guide Rail Square

First introduced with the release of our MTR-X Precision Triangle, our Triangle to Guide Rail Adapter (or, Triangle Adapter for short) is now available as a standalone accessory. If you previously purchased an MTR-18 or PTR-18 Precision Triangle, you can use this Triangle Adapter to convert your triangle into a large format, variable angle guide rail square. It's compatible with Festool, Makita, Milwaukee, Kreg, RIDGID, WEN and Powertec guide rails.

First, attach the Triangle Adapter to your triangle using the tapped accessory mounting holes found in various positions on the triangle face. Then, loosen the two hex screws securing the torpedo nut and slide it into your guide rail's top-mounted T-track. You can position the Triangle Adapter at any point along your guide rail. Complete the connection by securing the two hex screws on the guide rail side of the adapter.

What's Included in the Box

  • Triangle Adapter
  • Torpedo Nut with Keystone Alignment Feature
  • 2 qty. Custom M6x1.0 Hex Screws
  • 2 qty. M5x0.8 Flathead Socket Cap Screws
View AllClose

Warranty & Returns

TSO brand products are guaranteed for five years from date of sale against defects in materials or workmanship. Normal wear and tear and accidental damage are not covered. For any product determined to have a defect covered by this warranty, TSO Products will repair or, at its option, replace with current comparable product. Warranty requests require an RMA (return authorization number) prior to any return. Request an RMA number by contacting TSO Customer Service (
View AllClose

4 Reviews

  • 5
    Triangle to Guide Rail Adapter

    Posted by Erick Nordling on 30th Jan 2024

    The guide rail adapter for my triangle was easy to install to the track, and I sure smiled at being able to easily make 90 degree cuts quickly and accurately

  • 5
    Attach your TSO Triangle to your MFT track

    Posted by King Waters on 22nd Aug 2023

    Extend the versatility of TSO's highly rated Triangle with this attachment for your table track. If you doubt the quality of the design and use of this triangle, look for the UJK review of the triangle on YouTube. When the Brits say they find a product they want to sell, we should pay attention.

  • 5
    Triangle Rail Adapter

    Posted by Stephen E. Hastings on 11th Feb 2023

    Great workmanship. The adapter fit my Festool guide rail perfectly. Is much more accurate and easier to use than the aaTSO Rail Squares. If you have a TSO Triangle you definitely should get this.

  • 5
    Triangle to Guide Rail Adapter

    Posted by Bruce Campbell on 3rd Feb 2023

    great addition for the MTR-18

View AllClose