Quick lock and release knob, fits 2.5"-3.75" cupholders, 360° rotation for best viewing angle, screw installs and releases in seconds, universal use for smartphones, ipods & other portable devices.  Measurements: 4.33 Length/Inches, 4.33 Width/Inches Base Material: 60% Plastic, 40% Acrylonitrile Butadiene Styrene Care: Keep In A Dry Location Country of Origin: Imported Coordinating accessories sold separately.