A security apparatus for a portable electronic device comprises at least one support member comprising opposing side surfaces and a plurality of support member surface features. At least one of the opposing side surfaces comprises a first engagement structure. One of the at least two arms comprises a second engagement structure configured to slidably engage the first engagement structure allowing movement in a first direction and opposing second direction. At least one locking assembly is positioned on at least one of the at least two arms and comprises a plurality of lock surface features configured to couple to the plurality of support member surface features. In a locked position, the at least one of the at least two arms is enabled to slide in the first direction. In an unlocked position, the at least one of the at least two arms is enabled to slide in the second direction.