Dynabrade® Dynorbital® Electric Orbital Sander, Non-Vacuum Extreme Random, Tool/Kit: Bare Tool, 3/16 in, 12000 RPM, 0.3 hp, 6.9 in L x 3.7 in H. Dynabrade® Dynorbital® X51 Non-Vacuum Extreme Random Electric Orbital Sander, 3/16 in, 12000 RPM Speed