Abstract: Apparatus for attaching and locking an article to a mounting structure comprising a turnable lock having locked and unlocked states and a support rotatably supporting the lock thereon for displacement between first and second positions corresponding respectively to the locked and unlocked states. The support can be attached to an article. A bracket is intended to be attached to a mounting structure and the bracket is provided with an aperture of such a shape to allow passage of the lock therethrough in the unlocked state. In the locked state, the lock blocks removal thereof from the bracket.