Hand Pallet Stacker 1.5 Ton : Manual Stackers or Pallet Stackers are lifting equipment which commonly used in a warehouse or factory setting for Material handling. A stacker is a large machine used in bulk material handling. A walkie stacker or pedestrian walk-behind stacker is a walk behind pallet truck with a mast for lifting pallets to heights. There are many different types of stackers that are suited to different applications and weight capacities.