PanaVise 827-09 9-Inch Deluxe Mount Both adjusting points have a full range of motion: 210 Tilt, 360 Turn & 360 Rotation 1/4-20 mounting stud with lock ring Shafts are machined aluminum alloy 0.875" (22.2mm) in diameter Knob and tamper-resistant set-screw adjusting options included 9-Inch (228.6mm) overall mount length Both adjusting points have a full range of motion: 210 degreesTilt, 360 degreesTurn & 360 degreesRotation 1/4-20 mounting stud with lockring Shafts are machined aluminum alloy 0.875-Inch (22.2mm) in diameter. Knob and tamper-resistant set-screw adjusting options included. Square mounting base for solid surfaces, 2.5-Inch x 2.5-Inch (63.5mm x 63.5mm), with four 0.219-Inch (5.56mm) holes on 2.0-Inch (50.8mm) x 2.0-Inch (50.8mm) layout.