Kupo Shot Bag 10lbs is for stands and booms. It has a non-slip strap to wrap around the stand base or boom. This premium shot bag is made with black cordex textured nylon and a water resistant polyurethane coating on the inside. 2mm size steel balls are encapsulated into the bag making this bag dense to help weigh down stands and offer counterweight to any boom. Loading weight is noted on the shot bags.