The Tether Tools - Rock Solid - Aero Tripod Roller System RSDL012 is a versatile accessory that makes movement with the gadgets an incredibly easy task. It boasts knurled tightening screws, which are easy to turn and can secure each tripod leg in the dolly. For improved stability, the expandable base legs can extend from the center point between 10.75 inches and 15.25 inches. The roller system’s wingspan ranges from 23 inches to 31 inches. It can support weight of up to 15 kg. Whenever a typical tripod is installed, its height ranges from 34.25 inches to 46.50 inches. The Tether Tools aero tripod roller system is compatible with various tripod feet and legs.