The Festool 576339 ETS EC 150/5 EQ-Plus Random Orbital Sander is a 6-inch corded finish sander built for professional surface prep, fine sanding, and swirl-free finish work. This is a random orbital sander designed for fine sanding and controlled material removal. Model Number: 576339. If you spend hours flattening panels, cleaning up filler, or dialing in paint and clearcoat prep, this tool is built to keep you productive without beating up your hands.

What sets this sander apart is how it combines cut quality with comfort. The 5 mm sanding stroke gives it enough action for efficient stock removal in fine and intermediate sanding, while the stepless speed control keeps the pad moving consistently under load. In plain terms, that means you can stay aggressive enough to move through prep work without giving up the surface quality you need before finish.

Festool built this unit around a brushless EC-TEC motor, and that matters for two reasons: durability and packaging. The motor design helps extend service life while allowing the body to stay compact and low profile. Festool lists the housing at just 4-1/2 inches high, which makes a real difference when you are sanding vertical panels, edges, or overhead surfaces where a bulky sander gets awkward fast.

The ergonomic shape and balanced center of gravity are not just brochure talk here. This sander was clearly designed for one-handed control and for staying flat on the workpiece without fighting the tool. That is especially useful in cabinetry, millwork, painted surface prep, and automotive-style finish sanding where uneven pressure can show up in the final result.

Dust collection is another big part of the story. The Festool 576339 ETS EC 150/5 EQ-Plus Random Orbital Sander uses a 27 mm dust extraction connection and is designed to work within Festool's sanding system. Paired with extraction, you get a cleaner surface, better visibility, and less airborne dust hanging around your workspace. Less dust on the surface also means less rework, which is one of those things that saves more time than people expect.

On the practical side, the carbide-tipped sanding pad brake helps prevent the pad from over-speeding, which improves control and helps protect the work surface. Constant speed under load also keeps the sanding pattern more consistent. For finish work, that consistency matters more than raw speed, because it helps reduce uneven scratch patterns that show up later under paint or topcoat.

This sander runs on 120 VAC power, draws 400 watts, and uses a 6-inch interchangeable sanding pad. The speed range is 6,000 to 10,000 RPM, so you have room to tune the tool to the material, abrasive, and stage of sanding. It also includes Festool's Plug It power cord and comes packed in a Systainer3, which makes storage and transport a lot more organized than tossing a finish sander loose in the truck.

Who should buy it? If you are a woodworker, finish carpenter, cabinet installer, painter doing prep, remodeler, or a serious DIY user who cares about surface quality, this is the kind of random orbit sander you buy once and keep using for years. It is not a bargain-bin sander, and it is not trying to be. It is for users who want low vibration, excellent control, and a finish-ready result without fighting the tool the whole time.

Festool 576339 ETS EC 150/5 EQ-Plus Random Orbital Sander for finish guys who actually care about the last pass

This is the kind of finish sander that earns its keep by staying smooth, staying flat, and leaving less cleanup behind when the work has to look right.

• Who it's for: Woodworkers, cabinet shops, finish carpenters, painters doing prep, and remodelers who spend real time sanding and want better control with less fatigue.
• Why it stands out: The low-profile body, brushless motor, 5 mm orbit, and strong dust collection focus make it faster and easier to use than a lot of bulkier random orbit sanders.
• Worth knowing: This is a premium corded sander aimed at surface quality and comfort, not the cheapest way to knock down rough stock. If finish matters, that is exactly why it makes sense.

• Is this a corded or cordless sander? It is a corded random orbital sander that runs on 120 VAC power.
• What size sanding discs does it use? It uses a 6 in. (150 mm) sanding pad, so it is built for 6-inch sanding discs.
• What kind of sanding is the 5 mm stroke best for? The 5 mm stroke is a strong all-around choice for fine sanding and intermediate sanding where you want a good balance of cut speed and surface quality.
• Can it be connected to dust extraction? Yes. It has a 27 mm dust extraction connection and is designed to work with Festool dust extraction systems.