Base Screw Diameter: 3/8" Only 947g(2.08 lbs), compact and capable of supporting cameras up to 4Kg(8.8 lbs). Fluid drag system and spring balance keeps 360°panning rotation for smooth camera moves. Adjustable Handle can be extended from 37.5cm to 58.5cm, and mounted to either side of the Video Head. It can also be 85°/+90° tilt and 360°pan range. There are separate Pan and Tilt Lock levers for lock off shots. The sliding Quick Release plate helps to balance the camera, and the head comes with a safety lock for the QR Plate.