Drive-In pallet racking systems have a single entry/exit point. The pallets are loaded and retrieved from the same side making the last pallet loaded the first to be retrieved. The forklifts load a product onto the support rails by entering and retrieving while backing out of the rack. This type of pallet rack is called a last in, first out inventory system, otherwise known as LIFO. This racking system is perfect for products that are not date sensitive.

The defining feature that separates a drive-in pallet rack system from a drive-thru one. is the single opening for the forklift for loading as well as unloading. Both drive-in and drive-thru pallet racks offer excellent storage space, however, drive-in racks are often closed at one end by a wall or other installation. The forklift operators must drive into the racking system from one side and remove the pallets from the same entry point.

Drive-thru pallet racking systems have a separate entry/exit point. The rack operators can enter the pallet racks to load the pallets from one end and unload the product from the other end. Additionally, both points can be used for loading and retrieval.

Drive-Thru pallet rack systems differ from drive-in systems as they use a first-in-first-out inventory retrieval system, also known as FIFO. The first pallet loaded on the rail system is conveniently the first pallet to be removed from the other end. This rotation of product through FIFO method makes drive-thru pallet rack perfect for date-sensitive pallets. Fast moving items or perishables can efficiently be stored in drive-thru rack. from the same entry point.