There are a number of features or characteristics which may vary in lockers. Because purchasers will need to specify what they want in each of these when ordering, it is more common to order a particular configuration rather than buy "off the shelf" in a shop, although certain very common configurations can be found in shops fairly easily. These features include:
Material: steel is the traditional material; but wood, plastic, or laminate are sometimes used. Plastic or laminate lockers are sometimes advocated in environments, such as near swimming pools, where moisture accumulation may cause steel lockers to rust over time. They can also be used in external applications where internal space is not available.
Stepped/2-step lockers are two-tier lockers, usually available only in 15-inch (38-cm.) width; but the compartments and their doors have an L-shaped cross-section, which causes the division between the doors to follow a zigzag pattern. This configuration enables more hanging height to be included in both upper and lower lockers; but part of each compartment (the lower part of the upper one and the upper part of the lower one) will be only half the usual width of two-tier lockers.
For older kids, their locker is their daily lifeline at school — their own slice of real estate — so the space has to highlight their personality. — Nadine Jolie Courtney, Good Housekeeping, "10 Back to School DIY Projects Your Kids Will Love," 23 July 2018 By John Sleezer | Jesse Newell Gordon, standing outside his locker Monday night, hadn't had time to research the Royals' return from Washington. — Jesse Newell, kansascity, "How the Royals learned about the Kelvin Herrera trade before Monday's 6-3 loss," 18 June 2018 Athletics students may store workout items in their athletic locker. — Melanie Feuk, Houston Chronicle, "‘See something, say something’ emphasized as Lake Houston area ISDs examine safety measures post-Santa Fe," 22 May 2018 Smiddy tells a story about the nameplate from his locker once being taken and pinned to the wall in the training room. — Gentry Estes, The Courier-Journal, "Chasing Omaha: 3 days inside Louisville baseball's latest bid for the College World Series," 2 May 2018 About 10,000 pieces were in his car, about 1,000 pieces were in his locker and about 6,000 pieces were in his apartment, according to the complaint. — Ellie Kaufman, CNN, "Feds say 'overwhelmed' mailman stashed 17,000 pieces of mail," 20 Apr. 2018 The news came through a short video clip, in which a student opens their locker with the combination, 20-1-9, a nod to the year the new season will premiere. — Victoria Rodriguez, Seventeen, "Netflix CEO Reed Hastings Defends "13 Reasons Why" Season 3," 8 June 2018 Manafort previously took issue in court with a search of his storage locker in Virginia, which contained boxes of business records. — Katelyn Polantz, CNN, "Search warrant reveals Mueller's interest in Manafort's actions during Trump campaign," 10 Apr. 2018 According to The Patriot Ledger newspaper, Duxbury police began investigating Barlow last June after Easton police contacted them about chemicals, ammunition and a gun case found in his storage locker in Connecticut. — Christine Dempsey, courant.com, "Easton Police Chief: EMT Took 'Inappropriate' Pictures Of Patients In Ambulances," 22 Mar. 2018
Laundry lockers are used in places like hospitals and food-processing workplaces where uniforms have to be collected, laundered, then returned to their owners. The locker cabinet contains a number of very narrow lockers, each of whose doors is keyed using a key held by the owner, so that they have access only to their own locker; but the entire array of doors is embedded in a much larger door covering the entire front of the cabinet. Opening this opens all the lockers simultaneously, and requires the use of a master key which is held by whoever collects items deposited in lockers, for laundering, then returned in the same way, after which they items are accessible to owners using their individual small doors.