Description
Square Cuts Made Fast and Easy with Your Track Saw
Breaking down sheet goods is easy with a TSO Guide Rail Square in your shop. This must-have track saw accessory turns your guide rail into a large, precision square, enabling fast and accurate 90-degree crosscuts with less setup time, less marking, and fewer errors.
The GRS-16 PE v2 Guide Rail Square is perfect for crosscuts on sheet goods and is compatible with Festool, Makita, Milwaukee, Powertec, Triton, and WEN track saw systems.
Key Features
- Born Square: A proven design, CNC-machined from a single block of 6061-T6 aluminum, will never require fine-tuning or calibration.
- Work Faster: No need to scribe your cutting line; make a small tick mark at your desired cutting position, align the guide rail, and you're ready to start cutting.
- Fewer Errors: Cut your marking and measuring in half, and with it, your chances of making a mistake that costs you valuable time and materials.
- Parallel Edge: Reference your work from the front or back edge to fit your workflow.
- Solid Connection: A resilient latch coating grasps the guide rail and protects it from damage.
- Drop-on Convenience: Quickly attaches without the need to remove accessories, like hose deflectors, track connectors and clamps.
- Clamp Compatible: Notches on both reference edges provide room for your favorite track clamp. Including the Festool Screw Clamp (489570), Ratcheting Clamp (491594), and Axminster guide rail clamps.
- System Approach: Compatible with the TSO Parallel Guide System for making repeatable square and parallel cuts in one workflow.
- Anodized Blue: Provides a beautiful, durable, and non-marring finish.
- Made in the USA: Designed, manufactured and hand-assembled in Eagan, Minnesota.
See How It Works
Read our Guide Rail Square User Guide to learn about proper use and maximizing its benefits for your woodworking projects.

Trusted by Experienced Woodworkers
TSO Guide Rail Squares are highly praised by professional cabinet shops to seasoned woodworkers and discerning hobbyists. Here’s what real customers have to say:
“Easy to attach, solid & square!” – Wallace, Feb. 2024
“Very precise and worked perfect right out of the box.” – Ronnie, Jan. 2024
“Speechless. So simple and effective. Great design.” – Greg, Mar. 2024
“…performs as good or better than a table saw without the hassle! A portable cabinet shop!” – Ronald, Jan. 2024
“Although this was a splurge I cannot imagine not having it. Perfect every. single. time.” – Teri, Mar. 2024
“Has saved me from messing up a bunch of cuts. Would highly recommend.” – Gary, Aug. 2023
“Love the ‘quick connect' feature.” – Bryan, Oct. 2024

Compatible Accessories
- Protect your Investment: Store two TSO Guide Rail Squares in a Systainer Foam Insert compatible with our custom TSO Systainer³ M 112.
- Expanding the Reference Edge: Attach our Angle Accessory for a deeper (or longer) reference edge. Perfect for cutting rounded profiles.
- Make Perfectly Parallel Rip Cuts: Attach the TSO Parallel Guide System to completely eliminate the need to measure and mark before most cuts.
- Secure Your Work: With Axminster guide rail clamps.
Guide Rail Squares Fitting Other Brands
- GRS-16 PE D: Fits DeWalt
- GRS-16 PE K: Fits Kreg ACS
- GRS-16 PE R: Fits Ridgid
- GRS-16: Fits Festool, Milwaukee, Makita, Powertec, Triton, WEN
Technical Details
- Dimensions: 15.2 x 6.0 x 1.4 in. (386 x 152 x 36 mm) - click here for dimension drawing
- Weight: 1.9 lbs (862 g)
- Material: 6061-T6 aluminum, anodized, 5/8 in. (15 mm) thick
- Compatible Guide Rails: Fits Festool, Milwaukee, Makita, Powertec, Triton and WEN.
- Not compatible with Festool HK 55 Carpentry Saws including the FSK 250, FSK 420 and FSK 670.
- Not compatible with Bosch, DeWalt, Ridgid or Kreg tracks. (See other models.)
- 5-Year Warranty: Your TSO Guide Rail Square is guaranteed to be free of defects in materials or workmanship.
- Patented Innovation: Protected by U.S. patents 10,363,681; 10,434,678; 12,017,318 and Canadian patent 2,994,319.
Documentation
Videos
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Upgraded GRS-16 PE v2 Guide Rail Square with Faster, Drop-on Attachment
In just seconds, transform your Festool, Milwaukee, and Makita...
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Cross-Cutting with the GRS-16 and TSO Parallel Guide System
Here's a compact and precise way to achieve repeatable, identi...
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Track Saw Guide Rail Square - Presenting the GRS-16 PE
In just seconds, transform your Festool, Makita or Triton bran...
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TSO Products GRS-16 Guide Rail Square. Quick review.
TSO Products sent me the GRS-16 guide rail square and asked me...
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New Release: GRS-16 Track Square
Damion Fauser, furniture designer/maker and Wood Review author...
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GRS-16 Track Saw Guide Rail Square Review
Looking for a quick and accurate way to make square cuts with ...
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One month review of my TSO Products GRS-16
I found thus company on the internet while searching for other...
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Testing the TSO GRS-16 PE Square with the FESTOOL FS1400 Guide Rail
The friendly people at TSO send me their TSO GRS-16 PE. I cut...
Warranty & Returns
258 Reviews
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Increase speed 60%
After hesitation on buying the product, I have found it essential in breakdown plywood sheets. I don't have fancy tables for this, just a simple foam board and lay the plywood on top. With the PE, I'm able to measure once, attach to the track and go. Really simplified the process and improved the outcome. Exactly what I hope for with any tool purchase.
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GRS-16 PE Parallel Edge Guide Rail Square
I love this accessory. It makes breaking down sheet goods with setting up my Festool TS 55 track saw quick and easy.
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A simple concept, executed to perfection
I came across this product while looking at accessories for my recent Festool purchase (a cordless track saw). I had a job starting a week later involving cutting various sizes of MDF sheets. I live in Australia and doubted the product would arrive on time, also the cost in $AU was fairly high for such a simplistic looking tool. All that aside I placed the order and was surprised that I received the item on the day I started this particular job. I was naturally very pleased, but not as pleased as I was with the product itself. It is very well made and works as described. In fact I am very impressed to say the least. This simple tool is a credit to your company. Keep up the good work. Regards, Trevor Harvey
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Solid
Works great and is a dead on accurate, price is a bit high but man is it worth it! takes all the guess work out of 90's, just wish someone would come up with something to do 45's too. Get you one, you won't be sorry! Cheers, Charlie
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Beautifully Engineered
A fantastically simple answer to an age old problem...setting your track to a perfect right angle. This does that spot on.