The rails are held securely in the post with plastic
lock rings that do not fail as easily as the 'punched tab' type of connections. The
punched tabs usually break quite easily with any pressure.
Squeeze the lock ring to install it into the predrilled holes and
it will 'bounce' out into the holes. Then by inserting it into the prerouted holes on the
posts, the ring will 'pop' out to prevent removal of the rail, holding it firmly in the