Half door and two person lockers use as much space as a single full door locker, but they are split into two units, which doubles the number of lockers overall. These are extremely popular because they are a nice middle ground between full door and box lockers. They provide a moderate amount of storage space while also being more efficient on overall space than full door lockers. Used half door lockers are one unit over the other, each unit being the same with as a full door locker. Two person lockers are two vertical units side by side, which are the same width as one full door locker as well. They also have two small shelves overhead for storage of small items.
Locking options: various types of key locking or padlocking facility are available now. Key locking options include flush locks, cam locks, or locks incorporated into a rotating handle; padlocking facilities may be a simple hasp and staple, or else a padlocking hole may be included in a handle, often called a latchlock. More modern designs include keyless operation, either by coin deposit (which may or may not be returned when use of the locker terminates), or by using electronic keypads to enter passwords for later reopening the locker. Some older lockers used a drop-latch which was incorporated into the door handle, and slid up and down and could be padlocked at the bottom in the "down" position, but these are less used now. Three-point locking is not possible with this type of latch, because it needs to be operated by means of a latch that rotates rather than slides up and down; so this drop-latch is probably a less secure locking option, which may be why it is little used nowadays. Prefect Combination locks are very popular in school lockers used in the UK due to their ease of use and the time and cost saved in the removal of locker keys.