SHAREBOX Maxi Get your own Sharebox with 18 lockers to your free disposal. A Maximum Size Sharebox has 21 lockers in total. By ordering you get 18 lockers to your free disposal. For each cabinet, three lockers are reserved regular Sharebox customers. (unless otherwise agreed). By getting your own Sharebox you can easily hand over keys and other small items with, friends, family, colleagues, associates, members and Nabours. Safe, efficient and convenient.