The Roto-sucker is exactly what it sounds like. A hollow tipped vacuum sleeve on a rotary pivot point. It could be hard to imagine what one would look like but thankfully an almost life-size image gives you the visual.
The suction on this device definitely holds up to the "Ultra Suction" boasting on the packaging. Once engaged, it is easy to feel the pull generated by Roto-Sucker, there is even an immediate release button that can also be used to vary the suction experience. The bullet has seven different vibration speeds so there are plenty of options.