I'm a graduate degree'd engineer with a great appreciation for well designed tools, the owner of a handyman business who uses his tools daily to earn a living and a hobbyist woodworker. With that as background ...

I own a total of 3 track saw squares and this is by far the best designed, best built, and most accurate, but also the most expensive by a factor of 2.5x-4x. I've tested the accuracy of each of my 3 track saw squares and can confirm from firsthand observation that this is the most accurate. The SpeTool track square is also the only one that provides an actual accuracy spec ("guaranteed accuracy of ±0.01°"), while the others merely state "super crazy accurate -- trust us!". I can't measure the accuracy of my SpeTools track square, but as I stated above it is the most accurate of my track saw squares in my testing.

I recently used the SpeTools track square in fabricating some custom shelves for a client. The clamp mechanism does an excellent job of aligning the tool with the edge of the track. The tool is CNC'ed from a heavy aluminum plate that certainly appears to be robust and shouldn't easily get deformed in use. The hardware on the tool is all very good quality and functions extremely well. This is a large (long) track square, which allows for precise alignment with the edge of a board or sheet, but also makes the tool heavy and a bit clunky in use. There is a small "finger" support that sits on the edge of whatever is being cut to prop the body of the square up at the same height as the work-piece. Some track squares include support on both the front and back of the square, which I prefer.

All in all this is a high quality, very accurate track square, but that quality comes at a correspondingly high cost. For me the cost is justified, since I earn my living with my tools. A hobbyist may well decide a track square that's 1/3 the cost and performs almost as well is a better deal for their needs.

I have another right angle track saw attachment that looks like a child's toy compared to this one. For the record I have SpeTool pieces ranging from router bits right up through to their router sled. Their stuff is generally solid. Having said that, I haven't had a chance to use this yet. It does fit on my third party Makita compatible track saw guide nicely, but it is going to take a while to really put it through its paces.

The aluminum is really sturdy. The size of this guide really floored me. It's absolutely bomb proof in terms of the thickness of the aluminum. The anodization is nicely done but the real star is the rigidity of the frame.

Love this tool! Thought I would regret the purchase because of the price, but never looked back. Perfectly designed, heavy duty construction, have used it daily for several months and no regrets. It anchors the Festool track against the board and gives a consistent starting spot for the track saw, even when not cutting a square line.

This SpeTool track saw square is a heavy duty piece of equipment that feels solid in your hands. The aluminum construction isn't flimsy like some of the cheaper versions you see around. It has a substantial thickness of 0.84 inches which gives it a lot of rigidity when you are working on larger projects. You can tell right away that this was built to take a beating on a job site without bending or warping.The setup is incredibly fast thanks to the quick-lock mechanism. I just slide the guide bar into the track and flip the cam lever to lock it down tight. It doesn't wiggle or shift once it's set, which is exactly what you need when trying to get a perfect cut. The one handed design makes repositioning it very efficient so you aren't wasting time adjusting things constantly. It works perfectly with my DeWalt track saw system without any annoying gaps or play in the fit.I tested it against a known square and it held that 90 degree angle perfectly every single time. The precision machining is evident because the edge sits flush against the guide rail. This eliminates the guesswork when you're trying to make repeatable cuts for cabinetry or furniture. It provides a very stable foundation that reduces vibration while the saw is running.One thing to keep in mind is that if you are working on thin panels, you should use a spacer board underneath. This prevents the weight of the square from lifting the guide rail and messing up your line. It's a small detail but it shows this tool was designed by people who actually do woodworking. The orange finish is bright so it's easy to find in a messy workshop or on a dark floor.Pros:Extremely rigid aluminum construction that resists bendingVery fast setup with the cam lever lock systemHighly accurate 90 degree angle for repeatable cutsPerfect compatibility with DeWalt track saw railsSturdy build quality designed for professional useCons:Can lift thin panels if you don't use a spacer boardThis is a high quality tool that provides great value for anyone serious about precision cutting. It's much better than the thinner alternatives on the market and it's built to last a long time. If you want to stop fighting your saw and start getting perfect cuts, this is worth every penny.

This is a very well-made track saw square. The aluminum construction feels solid and precisely machined, and it fits the DeWalt guide rail securely. Installation is quick and straightforward, and once attached, the square is equally easy to position and operate.Most importantly, it provides an accurate 90-degree reference and makes square crosscuts much faster and more repeatable than measuring and aligning the track by hand for every cut. It also stays firmly positioned against the edge of the workpiece while setting up the cut.This is a simple accessory, but it makes a noticeable improvement in the convenience and usefulness of a track saw. It is precise, easy to use, and built like a quality tool. A very worthwhile addition to a compatible DeWalt track saw and guide-rail system.