The Festool Extension Wing Set for Kapex KS 120 Miter Saw (578921) is a stock-support accessory designed to extend the working surface on both sides of the Festool KAPEX KS 120 sliding compound miter saw. This is a miter saw extension accessory built for anyone cutting long material — trim carpenters, finish crews, and cabinet shops — who need a workpiece to stay flat and supported instead of see-sawing off the ends of a standard saw table. It replaces two older item numbers, 201187 and 497514, and consolidates them into a single set: the previous imperial-only wing (201187) and the previous metric-only wing (497514) are gone, replaced here by one dual-scale set that reads both imperial and metric measurements on the same telescoping arm.

Each wing — a left extension (497353) and a right extension (497352) — telescopes out from 58-1/4-in to 94-1/2-in (1480mm to 2400mm), which is the difference between fighting a piece of crown molding that overhangs the saw table and having it fully supported from end to end. An adjustable flip stop lets you set a length once and cut multiple pieces to that exact same length without re-measuring for every cut — set it, flip it down, make the cut, flip it back up out of the way for the next piece that needs a different length, then flip it back down when you return to the repeat cut.

The mounting system is what makes this practical for everyday use rather than a one-time setup: both wings attach to the KAPEX KS 120 saw base or to the optional underframe using Festool's tool-free V-groove interface, so there's no wrench work involved in breaking the station down or setting it back up. When the underframe isn't in play, the support legs on each wing fold back so the extensions sit directly on the ground at the same working height as the saw — useful for jobsite setups where a full underframe station isn't practical to haul in and out.

This set is built specifically for the KAPEX KS 120 and doesn't function as a generic material support — it's a dedicated accessory for that saw's base and underframe geometry. For anyone running a KAPEX KS 120 who regularly cuts baseboard, casing, crown molding, or long framing and square stock, this set turns a saw with a small stock table into a real length-cutting station capable of handling material up to nearly eight feet long, with the accuracy of a built-in measuring system instead of a tape measure and a pencil mark.

The Fix for KAPEX's Small Table

The Festool Extension Wing Set for Kapex KS 120 turns a saw that's excellent at short, precise cuts into one that also handles long trim and stock without a second person holding the far end.

• Who it's for: Anyone running a KAPEX KS 120 who regularly cuts baseboard, crown, casing, or long framing stock and is tired of eyeballing support on the far end of the saw.
• Why it stands out: One set now covers both imperial and metric measuring, so you're not stuck picking a version like you were with the two SKUs this one replaces.
• Worth knowing: This is a dedicated accessory for the KAPEX KS 120 — it mounts to that saw's base or underframe specifically, so confirm your saw model before ordering.

• Does this work without the KAPEX underframe? Yes. When used without the underframe, the support legs on each wing fold back so the extensions sit on the ground at the same working height as the saw.
• What did this replace? This set replaces two older item numbers, 201187 (imperial scale only) and 497514 (metric scale only), combining both into one dual-scale set.
• How long a piece can this support? Each wing telescopes from 58-1/4 in. up to 94-1/2 in. (1480mm to 2400mm) of support beyond the saw table.
• Will this fit any Festool miter saw? No. This set is built specifically for the Festool KAPEX KS 120 sliding compound miter saw.