NTT a handheld drill drum sander. One end attaches to the drill. The other (the red side) is a handle with bearings. Works great for shaping edges etc! : r/Tools
Vorole Handheld Drum Sander, 6 Variable Speed Polisher, 1400W Burnishing Tool, Polishing Machine, Surface Conditioning Tool with 4 x 4.7” Wheel Polisher for Metal Stainless Steel Wood Ceramic Tiles - Amazon.com