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Festool 577520 DTS 400 REQ Finish Delta Sander

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SKU FEST577520

A compact, lightweight detail sander that's easy to wield with one hand, the Festool RTS 400 REQ makes easy work of flat, vertical and overhead surfaces. Weighing in at only 2.4 lbs, it's also highly maneuverable, a key benefit when balancing on edges and following curves. Thanks to the delta-shaped pad, dipping into tight corners is easy. Additional features include stepless variable speed, and vibration-stop balancing for reduced fatigue during prolonged use. The RTS 400 comes equipped with a 100mm x 150mm triangular pad (approximately 4" x 6" overall).

Standard Equipment:

  • (1) DTS 400 REQ Detail Sander (577520)
  • (1) Plug-it Power Cord
  • (1) Soft sanding pad
  • (1) Edge protector
  • (1) Reusable dust bag
  • (1) Systainer


  • Power Rating: 250 Watt
  • Pad Size: 4"x 6" Triangle
  • Speed: 6,000 - 12,000 OPM
  • Sanding Stroke: 1/16"
  • Weight: 2.65 lbs


  • One-handed sander for small surfaces, edges and tight corners
  • 5/64'' sanding stroke offers an exceptionally fine finish
  • MMC electronics with 250 watt motor, a 25% increase over older models
  • Improved ergonomics with rubberized grip
  • Robust power switch for more durability
  • Interlocking dust port works with latest generation CT connector

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