SLIK 618-425 / PBH-425DS BALL HEAD is a sturdy, rugged, and dependable product designed to provide many years of satisfactory use. It has a maximum loading capacity of 3 kgs (6.6 Ibs) and is equipped with a quick release shoe that is *ARCA-SWISS compatible. The ball head also features a safety release knob, platform, U-groove, tripod mounting screw (U1/4"), double screw adaptor, and bubble level. It can be used to attach a camera to a tripod and allows for free movement of the platform while the ball fixing lever is loosened.