The Car-Rocker is a dual roller pneumatic vibrator, ideal for applications that require high frequency and high force. This WORKMASTER dual roller vibrator assembly is one of the original heavy-duty vibrators specified for unloading railcars. With only three moving parts (vane, inner and outer rollers), the vibrator has a long wear life and requires little maintenance. Equipped with a comfort grip side handle, the Car-Rocker is easily positioned in the pocket or moved from car to car. With two models available, the Car-Rocker is guaranteed to energize stubborn material, and promote complete and rapid flow of any material.