Our Trolley Manufacturers in Bangalore for Automobile Industry, Drive-in racking is suitable for goods that can be stored on pallets behind or on top of each other, but ideal when greater access is required compared to block stacking. Pallets are stacked by the first-in, last-out (FILO) principle on supports mounted on both sides of the drive-in channels. This means that individual pallets cannot be accessed directly, but one by one from the front of the rack.