Designed to make life easier when you're trying to move your dinghy around. The extra wide wheels are ideal for all firm surfaces & the heavy duty, spring loaded, locking system holds the wheels in three positions - up, middle or down. Self-lubricating & made from maintenance free, non-corroding/rusting lightweight components. Easy to fit (bolts not supplied). Max Boat Size: 12ft and/or 113kg (incl engine).