More commonly known as a "Coffin-Lock" or "Casket-Lock". Most often used when joining portable staging decks together. Also used by some touring companies as a locking mechanism for road cases. Requires a 5/16" [or 8mm] Hex (Allen) key.
Coffin Lock
Not to be confused with Rota-Lock.
Coffin Lock
Not to be confused with Rota-Lock.