Delta Shape for Corners & Profiles: The Mirka DEOS II Delta 663X is a delta shaped direct electric orbital sander designed for precise, efficient sanding of corners, profiles, vertical surfaces and hard-to-reach areas at any angle. Built for Woodworking & Decorative Painting: Specifically designed for use in woodworking and decorative painting applications where control and access matter most. Ultra-Compact Low-Profile Control: At less than 4" high, the compact low-profile design improves maneuverability and helps deliver precise, efficient sanding performance. Comfort for Long Sanding Sessions: Ergonomic design with low vibration and low noise level enables comfortable use for long periods with reduced fatigue. Easy Speed Adjustment + Brushless + myMirka Bluetooth: Easy-to-operate speed lever with visible LED indicators, plus a high-efficiency long-life brushless motor for consistent speed; Bluetooth connectivity integrates with the myMirka app for vibration exposure monitoring and additional settings/features.