Festool 12-in. Chain Link Extension Set for CT-ASA FLX Boom Arm, 3-Pack (578944)

This is a chain link extension set designed to increase the reach of a Festool CT-ASA FLX dust extraction boom arm. The Festool Chain Link Extension Set for CT-ASA FLX Boom Arm, 3-Pack (model KG-CT-ASA FLX/3) gives you three individual links, each one adding 4 inches (100 mm) of length, for a total possible extension of 12 inches (300 mm) when all three are installed.

A boom arm's job is to keep your dust extraction hose up and out of the way while you work at a bench or machine, and reach is what determines how far that coverage extends. If your current setup falls just short of covering your workstation, adding one, two, or all three links closes that gap without buying a longer boom arm outright.

Each link separates and reconnects by hand. That matters two ways: you can dial in the exact length you need rather than being stuck with a fixed extension, and if one link wears out or gets damaged over time, you replace just that link instead of the whole chain. Because the set comes as three separate pieces, it also works as a source of spare links for a boom arm you already own.

This extension set is made in Germany, matching the build quality of the CT-ASA FLX boom arm system it's designed for. It's a small, inexpensive accessory, but it's purpose-built for a specific job: keeping the vacuum hose overhead and out of your way at the bench.

It's built specifically for the Festool CT-ASA FLX J and W boom arms — anyone running one of those in a cabinet shop, woodworking shop, or general contracting setup who needs a little more overhead reach, or who just needs a replacement link, is the right buyer here.

Get the Hose Off the Floor

This little 3-pack stretches your CT-ASA FLX boom arm's reach so the dust hose stays overhead and out from underfoot instead of dragging across the bench.

• Who it's for: Shop owners already running a CT-ASA FLX boom arm who need a bit more overhead reach, or anyone whose chain has a worn link.
• Why it stands out: Each link is individually replaceable and snaps together tool-free, so you're never buying a whole new chain over one bad link.
• Worth knowing: This is boom-arm-specific — it only fits the CT-ASA FLX J and W boom arms, so double-check which arm you have before ordering.

• How much extra reach do I get? Each of the three chain links adds 4 inches (100 mm). Installing one, two, or all three extends the boom arm by 4, 8, or 12 inches total.
• Does this fit any Festool boom arm? No, it's built specifically for the CT-ASA FLX J and W boom arms.
• Do I need tools to install the links? No. The links separate and reconnect by hand, so you can adjust length or swap out a worn link without tools.