SHAPE’s mid-level spreader is compatible with SHAPE’s ST15 & ST20 tripods. It attaches to the tripod legs by clipping the quick-release handles to the hooks inside the tripod legs. It allows better stability and it’s adjustable to match changes in the tripod height and leg angles, by simply rotating the center head of the mid-level spreader. The arms of the spreader are telescopic to allow a wider tripod setup. A set of three Rubber feet are included in this bundle. They help stabilize and prevents tripod from sliding on smooth surfaces. They are used in combination with the mid-level spreader. They are made of resistant rubber and are easy to install with their rubber hooks. They have an anti-slip rubber sole.