The Bosch Ros 65vc I have is an awesome sander. The VC stands for vibration control, and the 65 means it can be 6" or 5". It can easily be used with one hand, and has a dial speed control. I use mine with a 1 1/4" inch hose on a Cman shop vac, also have their automatic switch, you plug the switch into the receptacle and plug your vac and your tool into the box, makes the vac automatic.