• Modular system: Base, Shaft and Head screw together • Solid steel Shafts [0.5" (12.7mm) diameter] will make a 2" (50.8mm), 4" (101.6mm) or 6" (152.4mm) long mount. 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! • Includes 2" (50.8 mm) round Base with four 0.188" (4.8mm) holes on 1.6" (40.6mm) bolt circle for solid surface mounting, and a T-Bar Clip for drop ceiling rails Choose Black or White.