This film was included in the three DVD set "Saved From the Flames"--a collection of mostly ephemeral movies that have managed to avoid turning to powder, catching fire or melting--something that usually happened with the nitrate film stock used up through the 1950s.
Apparently "Master Hands" was made for a stockholder meeting by Chevrolet and sings the praises of the modern industrial age and those who work with their hands (particularly machinists). However, interestingly, the film is made without narration--just lots of clips all elegantly strung together with a gorgeous sound track. It's almost like an art film in a way--exceptionally well done but also something the average person would be bored to tears to watch. And because it goes on for more than half an hour, I wouldn't recommend it...but I can respect it.