The ProMaster Studio Weight Kit allows you to increase the stability of your light stands, tripod, or other types of supports by adding strategically placed weight. The weight bag can easily be hung from the built-in weight hook on your tripod or mounted to almost any tubular or flat surface using the included mounting bracket. The bag will hold up to 8.8 lbs. of sand, stones, or other ballast. The bag holds up to 8.8 lbs. / 4kg. Clamp to a light stand, hang from a tripod versatile, and flexible for adding weight to stabilize your gear.