A double lock mechanism is provided that comprises a post section comprising a locking post and a plurality of post slots recessed into the locking post; and a locking section configured to engage the post section. The locking section comprises an insertion cavity configured to receive the locking post, a plurality of locking bars each having locking tips, and a spring configured to bias the locking bars in an engaged orientation relative to the post slots such that the locking tips engage the post slots; and wherein the locking tips are configured to disengage the post section when an external force is applied to the locking bars.