A merchandise security system includes a merchandise display having a first display member and a second display member vertically spaced from the first display member. At least one tile is mounted to the first display member. The at least one tile is movable between a first position blocking access to a desired column of associated merchandise stored on one of the first and second display members to a second position allowing access to the desired column of the associated merchandise. A lock member is operatively connected to the at least one tile for restricting movement of the at least one tile from its first position. The lock member is movable from the locked position where at the lock member interferes with movement from the at least one tile from its first position to an unlocked position which enables the at least one tile to be moved from its first position to its second position for allowing access to the desired column of associated merchandise.