A SMALLER MOUNT WITH A HOLLOW SHAFT FOR CRISP, CLEAN INSTALLS! Includes knob and set-screw adjusting options: your choice! • Hollow aluminum shaft [0.5" (12.7mm) outside diameter; 0.375" (9.5mm) inside diameter] with slot for cable pass thru • Pass thru slot is 0.375" x 0.625" (9.5mm x 15.9mm) • 1/4-20 stud with lockring • Fully adjustable at the camera (190° Tilt, 360° Turn & 360° Rotation) • Knob and tamper-resistant set-screw adjusting options included. • Matching vinyl cover adds a finished look! • 6" (152.4mm) overall length • 2" (50.8mm) round base with four 0.1875" (4.8mm) holes on a 1.6" (40.6mm) bolt circle