The RIDGID 5 in. Random Orbit Sander features an electronic speed control dial for maximum control for different applications. It has a variable no-load speed of 7000-12,000 RPM and a permanent magnet motor to maintain constant speed and power under load applications. Its onboard vacuum adapter fits standard 2-1/4 in. or 2-1/2 in. hoses for a cleaner, virtually dust-free work environment.