Workmaster 6 inch dual action air sander
Workmaster brand 6" dual action air sander AT-280 which is in great condition. Likely to be a generic brand from China similar to the sander in this link - https://www.steedtools.com/6-Dual-Action-Air-Sander-AT-280-pd701384.html Specs for the device are set out in the pics of the box.