Packaging was good to protect product. Definitely had sufficient variety of screws to meet your wood depth needs, I was impressed by the high number of wood and metal screws. This did not get a 5 because only the left rail has a stop, that is, when extending the keyboard tray I used this for, it will overextend if you pull out from the right side without a rail stop (no, I didn't try to figure out how to add one). There are no instructions, but if you order a set of slide rails all by itself, yoSee full review