Description
A Better Way to Connect Guide Rails

Watch this video to see how the GRC-12 auto-aligns and secures two guide rails at the same time, while eliminating the need for expensive straight-edges.
Another TSO innovation, the GRC-12 is a first-of-its-kind, self-aligning guide rail connector for use with Festool, Makita, Milwaukee, Kreg ACS, POWERTEC, WEN, and Triton brand guide rails. Before the GRC-12, aligning connected guide rails required a variety of methods and additional tools to achieve straight connections, with misalignment often difficult to detect without a long straight edge or similar tool. This issue becomes obvious too late—when gaps show up during assembly or glue-up.
The GRC-12 TSO guide rail connectors solve this problem with a completely self-contained and self-aligning design - thanks to an innovative integral keystone feature. Simply slide the GRC-12 into your guide rail T-slots and firmly tighten the M6 Mushroom Head Screws - that's it.
Because small hex wrenches can be annoying to deal with, we’ve solved that too: the included hex driver drops easily into the hex socket and is large enough not to get lost or easily overlooked.
Key Features of the GRC-12
- Connects AND aligns in one operation, with no need for secondary tools such as a level.
- Easy, fast, accurate!
- Only perfectly aligned rails can produce perfectly straight cuts.
- Unique Patent Pending design helps keep rails aligned.
- GRC-12 keeps rails aligned with it's Keystone-shaped Connector feature.
- Connected and done!
What's Included In the Box
- GRC-12 Guide Rail Connector (2)
- M6 Mushroom Head Screw, Stainless (8)
- M3 Hex Driver (1)
Technical Details
- Dimensions: 12 x .45 x .25 inches (305 x 11.5 x 6.4 mm)
- Weight: 2 oz. (60 g)
- Material: 6061-T6 aluminum, CNC machined finish
- Compatible Guide Rails: FESTOOL FS Series, MAKITA, Milwaukee, Kreg ACS, POWERTEC and Triton (not compatible with FESTOOL HK 55 Carpentry Saws including the FSK 250, FSK 420 and FSK 670; not compatible with BOSCH or DEWALT tracks)
Videos
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93 Reviews
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TSO GRC Kit used for Kreg ACS Track
I was thrilled to see the quality and craftsmanship in these rails compared to other brands and even Kregs own version. Everything you need is included in kit and the track stays locked solid and secure through normal everyday use and abuse. Thanks!
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GRC-12
I purchased 2 sets of these connectors. One is mine for use with a Makita track and saw. The other was for my neighbor who has a Festool track and saw. We are both very pleased with the TSO connectors. They hold tightly and bring the tracks together with no effort on the user's part. I highly recommend these connectors for anyone whose track will accept them.
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BEST CONNECTORS IN THE MARKET
Can’t recommend these connectors enough, these are hands-down the best connectors in the market and are worth their weight in gold in comparison to cheaper models.
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Self aligning guide rail connectors
Perfect as always from TSO!!
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Self aligning rails
They work great.