Short Throw Dual Stud Projector Kit. Continuous adjustment from 4" to 55". Two adjustable arm lengths (4" - 30", 30" - 55"). Short throw dual stud projector easy hook in place installation with horizontal and vertical adjustment at the wall plate. Short throw dual stud projector arm ideal for projectors weighing up to 50 lb. Built-in projector roll, pitch and yaw adjustments make alignment fast and easy. Quick release mechanism allows projector to be easily removed for service.