The Vortex Optics Pro Car Window Mount allows you to mount and use your spotting scope inside your vehicle. While staying in your vehicle, you can mount your spotting scope, look around, and if you don't see anything, move on to the next location. Covering large amounts hunting ground never got easier. FeaturesQuick-Release Plate with 1/4-20 Thread5 lb Max loadLightweight 11.9 oz