Types of Electric Pallet Jacks/Stackers Walkie Stacker: Designed with a lift capacity ranging from 2,000-2,500 lbs., this versatile option handles light-duty material handling applications quickly and easily. Industrial Walkie Stacker: With a 2,200-4,000 lift capacity, this industrial powerhouse has a double drive motor and a fully programmable drive system, making every stacking task