Description
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
Proudly Made in the USA

Videos
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TSO Products MTR-18 Precision Triangle - Product Overview
Much more than a triangle, the MTR-18 Kit is a first-of-its-ki...
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TSO MTR-18 TRIANGLE for use on Festool MFT-3 and Stanton Bench | DAVE STANTON wood shop
Create accurate angles on sheet goods on Festool mft-3 or the ...
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Easy Angle Cuts with MTR-18 Precision System Triangle
Shop Now 👉 https://tsoproducts.com/tso-precision-triangles/mtr...
Warranty & Returns
9 Reviews
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Must have for your triangle
I already had the rail square, but I liked the thought of this to turn my triangle into another rail square. It works great and there is zero deflection. I highly recommend this to anyone that owns a TSO triangle.
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Adapting Technologies
Another tool in the arsenal for making precise angled cuts between the MTR-18 Triangle and the Festool Rail (in my case).
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Rail Attachment to TSO Triangle
Works well to easily attach the TSO Triangle to the Festool Guide Rail. Helps create the perfect cuts your project requires.
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Not as good as most TSO PRODUCTS
I can’t imagine not having the protection, but the zipper is hard to retract fully and close.
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Excellent Quality but…
The machining is fabulous and makes the triangle much more useful. I would have preferred to pay more for the kit and have the adaptor included.