The red Pro Mini 30NS with Screw Knob Clamp from Photo Clam is a CNC-machined aluminum head with an Arca-type clamp that opens and closes by turning the knob. The 3.3"-tall ball head weighs 9.7 oz and has a load capacity of 44.1 lb. Furthermore, the main knob unlocks the ball movement, and a notch in the body allows you to place the camera in a 90° vertical position. A separate pan lock allows you to rotate the camera 360° independently from the ball movement. A tension control located on the main knob of the ball head allows you to dial-in how much or how little tension you want on the ball. In addition, the CNC-machined aluminum head includes a 42mm quick release plate with a 1/4"-20 camera mounting thread.