Kestrel is a brand originating from England, but owned by the French Deltalyo. Kestrel is a known manufacturer of many different tools for bodywork processes, including polishing machines. The most known one is probably the Kestrel DAS6 DA polisher.
A Dual Action polisher is a polishing machine that uses a circular motion combined with a spinning motion to create a rational double action. This motion is useful when polishing a surface by machine. The Dual Action polisher is famed for being easy to work with, making it ideal for beginners.