Removing the brushes from Porter-Cable’s 5″ Low Profile Sander (Model 390) makes it much shorter for easier hand control and eliminates parts to wear down, producing a machine that will run well for a longer period of time. An electronic motor brake reduces spin-down time by 73 percent. See this demonstrated, and more about the Porter-Cable 5″ Low Profile Sander — which sells for $145 — on the video.