The Leofoto YB-100P Series Leveling Base are designed to help users level a tripod in order to maintain level horizons and reduce time-consuming post processing corrections. The leveling base features a lightweight aluminum construction and the base is topped by a 3/8" mounting stud. The handle twists to lock the base in place for ease of use when mounted with three different handle length options available. Specifications: Base diameter: 100mm/ 3.93inLength: 136mm/ 5.35inWeight: 400g/ 0.88lb Leofoto 100mm Long Handle, 3/8" Threaded Leveling Half-Ball Adapter YB-100LP