The compact design gives the illusion of a single piece of furniture, but it’s actually independent ottomans that are attached by glides. There is no locking mechanism. When attached, the glides and rubber bumpers minimize, but don’t eliminate product movement. The ottomans could move or slip; especially during transport. The ottomans can be fully detached and arranged in several configurations. Only you can know what works best for your family. Don’t leave children or pets unattended. The safety of you and your family is of utmost important to us!