Rock N Roller Multi-Cart R10RT Max with Shelf Instantly transforms into eight different configurations Carries huge load capacity, yet folds small for storage Lightweight, rugged and ergonomically efficient steel frame No removable pins to lose Caster brakes assist loading on inclines Expandable frame adjusts to load size and shape Foldable sides rotate and lock into place via release cables Removable Shelf Kit instantly transforms carts into a mobile workstation R-Trac wheels feature pneumatic-like ride, light wei The RocknRoller Multi-Cart R10RT Max with Shelf package includes the RocknRoller Multi-Cart R10RT Max and the RocknRoller RSH10 Shelf Kit RocknRoller Multi-CartR10RT Max The RocknRoller Multi-Cart R10RT Max moves an amazing amount of gear This professional equipment cart is the world's most innovative moving machine The RocknRoller Multi-Cart R10RT Max has a frame expands and unfolds to accommodate innumerable cargo types and instantly transforms into any of eight configurations