Abstract: A latching holder for engaging an article comprises first and second co-acting members (1,2) which define a recess (8) for receiving an article. The members (1,2) are pivotally engaged together on one side of the recess (8). The first and second members have releasable co-acting cam means (11,29) on the opposite side of the recess, the cam means being operated to lock the first and second co-acting members together. A locking arm (20) is preferably used to operate the cam means. The holder has particular utility in holding the RF (radio frequency) aerial of a helicopter to the tail boom.