Explore many brands including 3m and Dynabrade. Ultimately, I chose it because of the price and the low air consumption. This grinder is very quiet and for the first 3 or 4 minutes of use my compressor didn't even turn on. Light weight and convenient to use. Works perfectly. When sanding dry the 600 works great, the pad doesn't stick at all and when sanding wet clean 1200-2000. Very happy with my purchase.