Key Features
Hybrid Power FlexRun this orbital sander cordless with a Festool Ergo battery or plug in with the optional AC adapter when you want continuous runtime. That gives you cordless freedom on site without giving up the option of corded work at the bench. Compact and BalancedThe low-profile layout and ergonomic battery setup keep the tool easy to control with one hand. That matters when you are sanding overhead, working on vertical panels, or trying to keep a finish surface flat. Cleaner SandingUse the included long-life dust bag or connect to dust extraction for cleaner surfaces and less cleanup. Better dust control also helps abrasive sheets cut more consistently instead of loading up early.
Overview
The Festool 576346 RTSC 400 18V Brushless Hybrid Cordless Sander BASIC is a compact finish sander built for detailed surface prep, edge work, and flat finish sanding where control matters more than brute size. This is a cordless orbital sander designed for finish sanding on wood, paint, filler, and similar surface materials. Model Number 576346. If you want Festool sanding performance in a lighter, more maneuverable format that can work on a battery or with an optional AC adapter, this is the tool.
The big selling point here is the hybrid setup. You can run the RTSC 400 cordless with a Festool 18V Ergo battery for mobility on punch-list work, trim installs, cabinet touch-ups, and site sanding, or switch to the optional AC adapter when you are parked at a bench and do not want to think about runtime. That kind of flexibility is not a gimmick. It means the same tool can handle quick service calls and longer sanding sessions without forcing you into one power setup.
Festool also built this sander around balance and user comfort. The low-profile body, compact footprint, and ergonomic battery arrangement help keep the center of gravity close to your hand, which makes the tool easier to guide on vertical surfaces, face frames, doors, and narrow parts. Supplementary product data also calls out a brushless EC-TEC motor, which helps explain why the RTSC 400 is positioned as a cordless sander with corded-level performance rather than a light-duty trim tool.
For finish work, the rectangular pad shape is the right call when you need to work up to edges, flatten smaller panels, or sand in tighter spots where a random orbit sander with a round pad is less efficient. The interchangeable sanding pad measures 3-5/32 inches wide by 5-1/4 inches long, and the sanding stroke is 5/64 inch. In practical terms, that gives you a controlled finish-sanding pattern suited to prep work between coats, final surface refinement, and sanding near corners and trim details.
Dust handling is another strong point. The Festool 576346 RTSC 400 18V Brushless Hybrid Cordless Sander BASIC includes a long-life dust bag, and Festool specifically highlights effective dust extraction as a core feature. Less airborne dust means better visibility on the work surface, cleaner interiors, and less contamination when you are working around stain-grade trim, painted built-ins, or finished spaces. If you already run a Festool extractor, this sander fits right into that cleaner workflow.
The included protector is not just an accessory tossed in the box. It is there to protect both the pad and adjacent finished surfaces when you are sanding right up against an edge or neighboring component. That matters for cabinet installers, finish carpenters, and remodelers doing punch work where one slip can leave a mark on an already-finished piece. Festool clearly designed this tool for close, controlled sanding rather than broad stock removal.
Compatibility is important with this model. The BASIC version does not include a battery, charger, or AC adapter, and supplementary data states that it is only compatible with Festool 18V Ergo batteries. That is worth knowing before you buy. If you are already on Festool’s sanding and dust extraction system, the RTSC 400 slots in easily. If you are not, make sure you are budgeting for the power setup you need.
This sander makes the most sense for finish carpenters, cabinet installers, woodworkers, painters, and remodelers who care about control, low fatigue, and clean results. It is not the tool you grab for aggressive material removal on large rough surfaces. It is the one you reach for when the surface is visible, the edge is close, and the finish actually matters.
Compact Control for Finish Work
This sander is built for the kind of work where feel and control decide the final result. The compact body keeps the tool easy to manage on narrow stock, face frames, edge sanding, and between-coat prep.
- Rectangular pad format is better suited to edge-near sanding than a round pad sander
- Interchangeable sanding pad size is 3-5/32 in. x 5-1/4 in.
Run Cordless or Plug In
The hybrid power setup is what separates this model from a lot of compact sanders. Use a Festool Ergo battery when you want full mobility, or add the optional AC adapter for continuous sanding at the bench.
- 18V platform with battery-powered operation available through Festool Ergo batteries
- Optional AC adapter allows corded use when nonstop runtime matters
Cleaner Work Near Finished Surfaces
Festool included the pieces that matter for controlled finish work: dust collection, surface protection, and organized storage. That makes this a better fit for punch-list jobs, install work, and interior sanding where cleanup and surface protection count.
- Includes long-life dust bag for onboard dust collection
- Protector helps reduce marring when sanding up against adjacent surfaces
What’s in the Box
- (1) Festool RTSC 400 Cordless Sander
- (1) Sanding Pad SSH-STF-80×130/12
- (1) Protector PR RTS-R 80×133
- (1) Dust Bag SB-Longlife RTS/DTS/ETS
- (1) Systainer3 SYS3 M 187
BASIC version does not include battery, charger, or AC adapter.
Key Specifications
| Voltage (V) | 18 V |
|---|---|
| Power Source | Cordless battery or optional AC adapter |
| Pad Size | 3-5/32 in. x 5-1/4 in. |
| Sanding Stroke | 5/64 in. |
| Dust Port Diameter | 1.06 in. |
| Batteries Included | 0 |
| Batteries Required | 1 |
| Made In | Germany |
Compatibility
Battery PlatformCompatible with Festool 18V Ergo batteries. Corded OperationCan also be used with the optional Festool AC adapter for continuous runtime. Dust ExtractionWorks with the included long-life dust bag and can be used with Festool dust extraction setups for cleaner sanding.
Built For
Finish Carpentry Cabinet Installation Woodworking Remodeling Paint Prep Trim Sanding Between-Coat Sanding Punch List Work
Pro Tip
If you are sanding along installed trim, cabinet sides, or face frames, snap on the protector before you start. It is one of those small parts that saves you from an expensive touch-up when you are working right against a finished surface.
Tool Nut’s Take
Tool Nut’s Take
Festool 576346 RTSC 400 18V Brushless Hybrid Cordless Sander BASIC for clean, controlled finish sanding
This is the one you buy when you want a compact finish sander that feels easy to guide, keeps dust under control, and gives you the choice of cordless freedom or corded runtime.
- Who it’s for: Finish carpenters, cabinet guys, woodworkers, painters, and remodelers doing visible finish work where control and surface quality matter.
- Why it stands out: The hybrid power setup, low-profile feel, dust collection options, and included edge protector make it more jobsite-practical than a lot of compact sanders.
- Worth knowing: This BASIC version is not a grab-and-go kit for new users. You need a compatible Festool 18V Ergo battery or the optional AC adapter, and neither is included.
Common Questions
- Is this a random orbit sander or a finish sander? It is a cordless orbital finish sander with a rectangular pad, built for controlled surface prep and finish sanding rather than aggressive stock removal.
- Can the RTSC 400 run corded and cordless? Yes. Supplementary product data states it can run on a compatible Festool 18V Ergo battery or with an optional AC adapter.
- Does this BASIC version include a battery or charger? No. The BASIC version does not include batteries, a charger, or the AC adapter.
- What battery system does it use? Supplementary product data states this model is only compatible with Festool 18V Ergo batteries.
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