The random-orbital sanding action of this OBS-18 orbital sander rental removes the scratch patterns left by drum or rotary sanders, leaving a smooth, flat floor ready for refinishing. The OBS-18 is perfect for interim "screen and recoat" sanding jobs. It has a totally enclosed, one-horsepower dual capacitor motor that is fan-cooled to eliminate overheating. This orbital sander makes 3,450 orbits per minute which is faster than any other orbital sander on the market. It also features a heavy-duty main frame made of cast aluminum and a pad driver plate for added strength. This floor sander also has torque-less operation for enhanced operator comfort. Gap Power supplies all your sandpaper for floor sanders. Sometimes called a wood sander