The RPA is the top-selling projector mount in the industry! More RPA Series Mounts are installed in offices, schools and homes than any other mount. Maintains registration when disconnected and doesn't affect preset adjustments. Quick connect/disconnect for convenient lamp and filter access on most projectors. Independent roll, pitch and yaw for quick and precise projector registration. All-Points Security exclusive steel-into-steel locking hardware at all key connection points to protect against theft.