The Tuck Top Auto Lock Bottom is a great choice for fast assembly. Four flaps that fold and lock together to form the bottom are present. Compared to the Tuck Top Auto Bottom, this design is more affordable, but it takes longer to assemble. It is perfect for heavier objects because of the sturdy design and bottom snap closing. Pre-gluing eliminates the requirement to first tape the self-assembling bottom before turning it right-side up to insert merchandise. It's as simple as opening the box, adding the contents, and shutting it (either with tape or a convenient tuck top).