Pantographic arms keep the wiper blade in more vertical orientation, providing a wider and flatter sweep pattern Stainless steel construction Can only be used with AFI-2000 and MRV motors Adjusts 12 inches to 17 inches All AFI Deluxe pantographic wiper arms come with an articulating feature which allows the arm to lock into position when it is bent back for window washing Motor shaft mounting has additional set screw for secure clamping Use with Deluxe or Premier blades