The Preston Double Wheel Conversion Kit from Preston Innovations is a quick and easy to fit accessory that upgrades a standard two-wheeled barrow or shuttle into a more stable four-wheeled setup. It is fully load bearing, and the option of using either two or four wheels provides greater versatility depending on the terrain. The improved stability over a two-wheeled shuttle makes it easier to move heavy loads. - Quick and easy to fit - Fully load bearing - 2 or 4 wheel use provides greater versatility - Improved stability over a two wheeled shuttle - Kit includes: 2x adaptors and 2x wheels