What Is a Hand Pallet Truck?
A hand pallet truck (also called a pallet jack or pallet pump) is a manual device used to lift and move wooden or plastic pallets.
Wikipedia
It uses a hydraulic pump: when you pump the handle, the forks raise slightly so the pallet can be moved.
These trucks are very cost-effective for transporting palletised loads over short distances (e.g., inside warehouses, loading docks).