This Professional Tripod Ballhead is made from black anodized aluminum. There are three operation knobs on this ballhead. Loosen horizontal control knob, the mounted camera can be rotated 360 Degree horizontally, also there are scale on the pan, suitable for panoramic shoots. Two knobs precisely control the ball adjustable angle, achieve no dead angle. 3/8″ screw thread base for tripod and 1/4″ screw thread for most camera. Also a built-in compass is on the clamp knob, very useful.