The Smith-Victor BH5 Metal Alloy Ball Head Ball Head is a rugged and well-designed ball head. It is rated to support up to 26 lbs, and is ideal for use with pro SLR cameras with long pro zoom lenses attached. All knobs feature a comfortable knurled rubber gripping surface. In addition to the large single-action locking knob, the BH5 also features two smaller knobs. One controls the 360° panning control, and the other the amount of ball friction.