The PC grinder is slow enough to grind paint. So I rounded the edge of this new pad a bit and use it as a powerful massager for the muscles in my upper back, neck, forearms, quads, glutes, thighs, calves and fingers when I'm working or working too hard. The Brookstone massager is not strong enough for my large muscles. As a massager, it's a bit noisy and heavy, but that's where the power lies.