Festool says the  RTS 400 REQ and DTS 400 REQ are lightweight, ergonomically designed, hand-held, orbital sanders with 250 watts of power and a short 6/64 in./2mm stroke. They feature a 25% increase in power over previous models, Festool says, as well as MMC electronics. Other features include a pad protector designed for minimizing pad damage and protecting adjacent surfaces, a rubberized over-grip, a bayonet-style dust port connection and an optional, reusable Longlife Filter Bag with quick release. The DTS 400 REQ and RTS 400 REQ are designed for one-handed use for fine finishing and have stepless variable speed from 6,000 to 12,000 RPM.