Leupold Window Mount Clamp Black Aluminum. Outfitted with a 3/8in-16in screw it accepts the new Pro Gear Panhead as well as most third-party options and its rubberized clamp wont scratch glass. It also features a large locking knob for speed and security. Even with gloved hands you'll be able to go from driving to glassing in just a few quick motions. Specifications for Leupold Window Mount Clamp: Manufacturer: Leupold Color: Black Fabric/Material: 6061-T6 Aluminum Weight: 9 oz Height: 2.25 in Width: 2 in Length: 2.5 in Features of Leupold Window Mount Clamp The tough and dependable 6061-T6 aluminum body stands up to abuse without losing tension. Non-marring rubber pads ensure a firm grip that wont leave scratches. Tighten or loosen the mount using the large locking knob even while wearing gloves. Package Contents: Leupold Window Mount Clamp Leupold 183551: Window Mount Clamp Black Aluminum