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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GSR 16 TOP QUALITY
REAL NICE TOOL NOT A 1 TIME TOOL(WOODPECKER)NICE JOB.
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Outstanding!
90 degree cuts with no fuss no muss.
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Must Have Accessorty for Track Saw
I have been scouring the internet to find this type of tool and here it is. This accessory takes the track saw from being good to stupendous. I absolutely love this square and have actually looked at purchasing competitor options in the past. In fact, I had a competitors purchased and ready to be installed prior to seeing this one. The fact that you don't have to square it up everytime makes a world of difference to me. Great tool and highly recommended.
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Very handy!!!
This is one of the simplest most effective add on i have for Festool tracks. After 30 seconds of consideration I cut one of my 55 rail in to 2 pieces one at 35" the balance for the other. It is the handiest thing in the world for crosscutting 24" ply. I will be using my other 55 on my paulk bench with the crosscut guide. Use the PE on it to index the system no more square looking for daylight. Loose the back rail lock on the pe drop on the guide support, clamp it down . All ready to go perfectly square.
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simplicity at its best.
Very well thought out product. I'm not sure why it costs more but the PE is worth the upcharge for its additional opposite edge option. No fuss just clamp it on and go. I only use the Festool track so I only assume it works as well with the others.