Designed to hold a light fixture or accessory in place, the Pivot Arm 20" with Adjustable Wheel Lock Control is a space-saving grip tool for a variety of applications. It's a great match-up with a super clamp, for instance, with an optional camera platform for highly mobile work. The wheel at the arm's elbow is capable of tension adjustment so that you can easily secure gear weighing up to 8 lb in the position you've chosen.