The Duo suction 2x15 cm lifter with large flexible heads makes lifting windshields easier and less awkward! Attach this suction handle to the window you need to lift. Flip-down the tabs to tighten the suction cups to the surface and lock in place. the ergonomic handle is useful for vertical and horizontal applications. Always test to make sure good suction is achieved before lifting. In extreme cold, the rubber suction cups will need to be warmed to function properly.