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. Features: - Independent roll, pitch and yaw for quick and precise projector registration. - Quick connect/disconnect for convenient lamp and filter access on most projectors. - Maintains registration when disconnected and doesn't affect preset adjustments. - All-Points™ Security exclusive steel-into-steel locking hardware at all key connection points to protect against theft. - Multiple installation options: flush mount to ceiling, mount with 0.25" threaded rods, or mount with 1.5" NPT threaded extension column. - Cable management without additional accessories.