Guide Rail Squares

The Original, Patented Guide Rail Square

Since its initial release over seven years ago, the GRS-16 Guide Rail Square has become an essential companion to the track saw for two big reasons: accuracy and efficiency. With the GRS-16, you can break down sheet goods much faster while ensuring perfect 90° cuts every time. So what makes the GRS-16 the best tool of its kind?

• Born Square: All GRS-16 squares feature a single-piece design that self-squares to 90° with no adjustments needed (and therefore, no points of failure in the future)
• Rock-Solid Attachment: Super strength, custom draw latch features a resilient coating to grasp the edge of your guide rail and prevent marring
• The Perfect Form Factor: Lightweight design that balances perfectly once attached to your guide rail, and compact enough to fit into a Systainer (with optional Foam Insert available)
• Expandable: Accessory mounting holes enable connection to the TSO Parallel Guide System and Angle Accessory
• Wide Compatibility: We now offer a GRS-16 model compatible with most popular track saw systems, including Festool, Milwaukee, DeWalt, Makita, Ridgid, Kreg ACS and Triton

Simple, Automatic Accuracy

Before the GRS-16, methods for squaring a track saw relied on the loose-tolerance T-slot found in every guide rail. To overcome this inherent inaccuracy, woodworkers relied on a separate reference square, plus a combination of loose parts like T-bars, hex bolts, and knobs. These shop-made solutions would often quickly fall out of square, requiring constant vigilance and recalibration to maintain accuracy.

The patented GRS-16 family solves this problem with a simple one-piece design that self-squares as it attaches to the guide rail. Once connected, the GRS-16 becomes a rigid extension of your guide rail, providing a precise 90° reference edge (or two, in the case of the GRS-16 PE) that won’t fall out of square over time.

Read our blog post to Learn How to Use Your Guide Rail Square.