The Festool 201180 KA-UG-R Right Side Kapex UG Extension is a right-side extension arm for the Festool KAPEX mobile cutting station. This is a miter saw stand extension designed for stock support and repeat cuts on a KAPEX setup. Model number 201180. If you run a KAPEX KS 120 and need better support for long trim, molding, or jobsite cut lists, this add-on gives you more usable table length without turning your station into a bulky shop fixture.

What matters here is not just that it gets longer, but how that helps in real use. The extension arm starts at 58-1/4 inches and expands out to 94-1/2 inches, so longer material stays supported instead of tipping or dropping at the far end. That means cleaner handling, better control at the fence, and less second-guessing when you are trying to land accurate crosscuts on finished material.

Festool builds this extension around quick setup. It attaches tool-free to the KAPEX UG underframe, so it is practical for contractors who break down and move often. You are not wasting time hunting for hardware or dealing with a clumsy bolt-on support every time the saw station comes in and out of the truck. The adjustable support foot also helps level the extension to the material instead of forcing you to shim or improvise on uneven ground.

The integrated stop and measuring scale are the real time savers for trim and production cutting. When you are cutting repeated lengths, having a flip stop right on the extension lets you set once and keep moving. That is the difference between measuring every piece and just feeding stock through with confidence. For anyone doing interior finish work, cabinet installation, punch-list trim, or shop prep, that repeatability is where the value is.

Compatibility is straightforward and important. This right-side extension is made for use with the UG-KAPEX KS 120 Underframe and is suitable for the KS 120. It is part of the Festool KAPEX mobile cutting station system, so it makes the most sense for users already invested in that platform. It is not a universal stand accessory, and that is actually a good thing because the fit and function are built around the KAPEX station rather than trying to be a compromise piece for every saw on the market.

One practical note buyers should know before they order: Tool Nut notes that KAPEX UG extensions cannot be used with the older crown stops that attach directly to the saw, specifically part number 494369. Festool offers crown stops part number 203356 for use with the UG extensions. If your saw station is set up for crown work, that matters because it keeps you from finding out about the mismatch after everything is already on site.

Who should buy this? KAPEX owners who cut long stock regularly and want a cleaner, faster miter saw station setup. Finish carpenters, remodelers, installers, and serious shop users will get the most from it. If you only make occasional short cuts, you may not need the added reach. But if your work involves repeatable trim cutting and you want the stand to do more of the holding and measuring for you, this is the right kind of upgrade.

Festool 201180 KA-UG-R Right Side Kapex UG Extension is the add-on that makes the stand earn its keep

If you already run a KAPEX UG station, this extension turns it from a portable saw stand into a much more capable cutting setup for long, repeatable work.

• Who it's for: KAPEX KS 120 owners doing trim, molding, cabinet work, and other jobs where long stock support actually affects speed and accuracy.
• Why it stands out: Tool-free mounting, built-in measuring and stop functions, and nearly 94-1/2 inches of support make it useful in the real world, not just nice on paper.
• Worth knowing: This is a dedicated system accessory, not a universal extension, and the underframe is sold separately.

• What saw is this extension designed for? It is suitable for the Festool KS 120 and is used with the UG-KAPEX KS 120 underframe.
• How far does the extension reach? The extension arm measures 58.25 inches without the telescope and expands to a maximum measuring length of 94.5 inches.
• Does it attach with tools? No. Festool specifies a tool-free connection to the KAPEX UG mobile miter station.
• Can it be used with older saw-mounted crown stops? No. Tool Nut notes that part number 494369 cannot be used with UG extensions. Festool part number 203356 is the compatible crown stop option for UG extension setups.