Electronic Supply by Industrial Electronics in Milwaukee Wisconsin : Potter Brumfield, Radio Shack Stores in Milwaukee: Dual Option Mount, 3" (Black) Dual Option Mount, 3" (Black) ================================================================================ Staff on 05/11/2009 04:08:00 AVOID SURPRISES...WITH TWO MOUNTING OPTIONS, WE'VE GOT YOU COVERED! You'll never be without the right mount when you take along Dual Option Mounts from PanaVise. * 3" (76.2mm) overall mount length * Includes two mounting bases that screw easily into the machined aluminum alloy shaft [0.875" (22.2mm) in diameter] * Use the Tri-Foot Base [4" (101.6mm) outside diameter with three 0.265" (6.7mm) holes on a 3.25" (82.5mm) bolt circle] for solid surfaces, or the T-Bar Clip for drop ceiling rails * Full range of motion at the camera: 210° Tilt, 360° Turn & 360° Rotation * Knob and tamper-resistant set-screw adjusting options included * 1/4-20 mounting stud with lockring