The Festool 576173 HKC 55 Cordless Bluetooth 5.2Ah Track Saw PLUS-FSK is a cordless track saw kit for carpenters, remodelers, and jobsite pros who want accurate cross cutting and straight cutting without being tied to a cord. This is a track saw designed for mobile cutting, repeatable crosscuts, and guided straight cuts in wood materials. Model Number: 576173. With the saw, FSK 250 cross-cutting guide rail, two 18V 5.2Ah batteries, charger, and Systainer3 included, this package is set up as a complete portable cutting system right out of the box.

What makes this kit different is how it bridges the gap between a circular saw and a miter saw. Festool positions the HKC 55 with the FSK rail as a mobile miter-saw system, and that is the practical value here. You can make fast, accurate cross cuts on site, then decouple the saw from the rail when the job calls for more flexibility. If you are moving from room to room, floor to floor, or cutting outside where a chop saw setup is a hassle, that matters more than another spec sheet ever will.

The cutting features are aimed at real jobsite use, not showroom talking points. The cutting depth adjustment includes a plunge function, so you can preset depth and drop into the cut when needed. The hinged-cover remote control lets you pull the protective cover back from the front handle to keep your hands clear while improving your view of the blade area. Festool also calls out the integrated guide wedge, which helps keep cuts unobstructed and supports safer, more controlled plunge cutting.

Accuracy is a big part of why someone buys this kind of saw, and Festool clearly leaned into that. The open construction, viewing window, and continuous cutting indicator are there so you can track the scribe mark and blade position more easily during the cut. The FSK cutting rail adds repeat accuracy, while the stop system allows repeated angle cuts. Festool lists saw angle adjustment from 0 to 50 degrees with a central clamping mechanism, and the rail stop system is designed to make repeat angle cuts from negative 60 degrees to positive 60 degrees. In plain terms, this setup is built for trim, framing, and general carpentry work where speed is important but sloppy cuts are not an option.

On the power side, the brushless EC-TEC motor and 18V lithium-ion battery platform are what make the HKC 55 viable as a serious cordless cutting tool instead of just a convenience saw. You get two Bluetooth 18V 5.2Ah batteries and a TCL 6 charger in the kit, which helps keep the saw working through a normal day instead of forcing constant charging breaks. Festool also notes that the HKC 55 does not have variable speed, so this is a purpose-built wood-cutting saw focused on straightforward, consistent cutting performance rather than material-specific speed tuning.

Jobsite practicality is also handled well. FastFix saw blade changes make blade swaps quicker, and the quick-acting closure lets you connect or disconnect the saw from the cutting rail in seconds depending on the cut. The retraction function built into the rail, with an adjustable stop and integrated rubber spring, returns the saw to the starting position so the system is ready for the next cut. That sounds minor until you are repeating cuts all day and want the setup to work with you instead of slowing you down.

This kit makes the most sense for finish carpenters, framers, remodelers, and general contractors who need portability and precision in the same package. If your work involves trim boards, framing stock, panels, roof work, or jobsite crosscuts where carrying a full miter saw is overkill, this saw earns its keep. If you need variable speed for a wider mix of materials, this is probably not the right fit. But if you want a cordless Festool track saw system centered on clean, repeatable wood cutting, this kit is put together the right way.

Festool 576173 HKC 55 Cordless Bluetooth 5.2Ah Track Saw PLUS-FSK is a smart buy for mobile precision cutting

This kit gives you a genuinely useful middle ground between a cordless circular saw and a miter saw setup, and for the right user that is a big deal.

• Who it's for: Carpenters, remodelers, framers, and contractors who want clean crosscuts and guided straight cuts without hauling a stationary saw everywhere.
• Why it stands out: The included FSK rail turns the HKC 55 into a portable repeat-cut system, and the brushless 18V platform keeps it jobsite friendly.
• Worth knowing: This is a wood-focused cordless cutting setup and Festool specifically notes there is no variable speed. If that does not matter for your work, this package is a very practical way to buy into the system.

• Is this a cordless saw? Yes. It uses Festool 18V lithium-ion batteries, and this kit includes two 18V 5.2Ah battery packs and a charger.
• Can the saw be used with and without the guide rail? Yes. Festool states the saw can be coupled to or decoupled from the cutting rail quickly depending on the job.
• Does the HKC 55 have variable speed? No. Festool specifically notes that the HKC 55 does not have variable speed.
• What kind of cutting system is this meant to replace or supplement? Festool positions the HKC 55 with the FSK rail as a mobile miter-saw system for accurate and repeatable cross cutting on site.