Pedco UltraClampMeasures 3" x 1 5 8" x 5 1 2". Black aluminum construction including screw. Injection molded, glass reinforced nylon thermoplastic resin clamp head and knobs. Fits any device with a 1 4 20 tripod socket. Attaches to round or flat objects up to 1 1 2" thick. Positions device at any angle. Maximum safe load: 6 lbs. Allows a camera to be solidly attached to a rolled down car window, bicycle handlebar, picnic table or other similar object. Strong enough