Pioneer Audio Visual Equipment supplies Wall Automatic Roll-back Spring Action. Pioneer Audio Visual Equipment manufactures projection screens of all sizes and types used for Front and Rear Data & Video LCD/DLP Projectors, Slide projectors and Overhead Projectors. Wall Automatic Roll-back Spring Action is a wall/ceiling mounting screen. This comprises of the viewing surface rolled over a spring roller and encased in a barrel [box type casing]. It has two brackets for mounting on walls. The screen has to be pulled down and the handle affixed on a hook. After use, the screen will wind automatically upwards on release of the handle owing to the Spring Action mechanism.