The WP21US provides ideal placement and alignment for mounting to wood studs, steel studs, and concrete. Includes RPA mini universal projector mount (RSAUS). Also supports wall-mounted long-throw projectors. Features: Precision adjustment Projector mount slides along arm for infinite projector placement Integrated micro leveling Lateral shift of 1.75 Integrated cable management Aesthetic covers and inlay style cable management system conceal and protect cables for a clean finish Multiple installation...