This set of three Leofoto 50mm Suction Cup Tripod Feet are silicone rubber platforms that attach directly to the tripod legs via its 3/8"-16 stainless-steel ball-and-socket joints. Thus, the feet are compatible with Leofoto tripods. With the cut notch on the feet, the ball-and-socket joints move to a 90° angle, which allows the tripod to go low to the ground. Meanwhile, the feet also suction to smooth surfaces and even keep the tripod stabilized on icy uneven terrain.