SLIK PBH-525 DS Ball Head with Arca-Swiss Quick Release, Supports 8.8 lbs., Black (618-525) Versatile, professional tripod head which features an Arca-type quick release system for enhanced compatibility with Arca-type accessories The head weighs 1.2 lb, supports up to 8.8 lb, and is 4.3" in height A separate pan lock allows the head to rotate 360 while keeping the ball locked in place The separate ball control lock is paired with a tension knob which permits the user to control the speed of the ball's movement Tension Control