At first, you can't open the drawers at all. When you slide the drawers eachother well, you will be able to unlock the key.
Eight years has passed, since the RF-5 "Sliding 4 Drawer Chest" wasdesigned. Finally, it was manufactured. The drawer was reduced from four tothree, to cut the cost. The distance between upper drawer and lower drawerbecame near. Therefore, it became easier to make the mechanism comparatively