The Festool DTSC 400 3.0 I-Set cordless delta sander delivers outstanding mobility and control for precision sanding on edges, corners and narrow surfaces. Its compact low-profile design and perfectly balanced ergonomics allow comfortable one-handed operation—even overhead or vertically.
Powered by Festool’s 18V Bluetooth® Ergo battery system and brushless EC-TEC motor, the DTSC 400 provides mains-level performance with cordless freedom. Included batteries communicate automatically with compatible Festool extractors for seamless dust control, while the supplied plug-it mains adapter enables unlimited runtime when needed.
Key Features
- Maximum mobility: Lightweight 1.4 kg design ideal for overhead and vertical sanding.
- Mains-level performance: 18V Bluetooth® Ergo battery with brushless EC-TEC motor.
- Dual power flexibility: Operates on battery or plug-it mains adapter for unlimited runtime.
- Bluetooth® connectivity: Automatically activates compatible Festool dust extractors.
- Cleaner working environment: Long-life reusable chip collection bag or extractor connection.
- PROTECTOR attachment: Enables smooth sanding along frames, edges and panels.
- Perfect ergonomics: Balanced weight distribution with soft-grip handling.
- CLEANTEC bayonet system: Secure and fast extractor hose connection.
- Compact delta pad design: Ideal for corners, window frames, doors and narrow surfaces.
- Festool system integration: Compatible with abrasives, batteries and extraction system accessories.
Technical Data
| Battery Voltage | 18 V |
| Battery Capacity | 3.0 Ah |
| Idle Engine Speed | 6,000 – 10,000 min⁻¹ |
| Sanding Stroke | 2.0 mm |
| Sanding Pad Size | 100 × 150 mm |
| Dust Extraction Connection | 27 mm |
| Drive Type | Battery |
| Product Weight | 1.00 kg |
| Included Accessories | 2 × 3.0Ah Bluetooth® batteries, ACA plug-it mains adapter, rapid charger TCL 6, chip collection bag, protector, StickFix sanding pad, Systainer SYS3-Combi M 287 |





















