The Smith-Victor BH8 Metal Alloy Ball Head is a rugged and well-designed ball head. It is rated to support up to 40 lbs, and is ideal for use with any pro SLR setup, or even a large format camera. All knobs feature a comfortable knurled rubber gripping surface. In addition to the large single-action locking knob, the BH8 also features two smaller knobs. One controls the 360° panning control, and the other the amount of ball friction.