The Vortex car window mount attaches to any lowered vehicle window, giving you a stable platform for your spotting scope or binoculars. Ready to use in seconds, the Vortex Car Window Spotting Scope Mount's twist-lock design allows you to control all pan and tilt action with one hand. Padded jaws protect vehicle's glass 5 Pound Maximum Load Folded Height - 3" Once you get your target in view, simply tighten the Vortex Car Window Mount for a sturdy platform with no unwanted movement or wobble. Mfg: Vortex Optics