Guild Wars Lock picks
When to use them?

In Guild Wars Lock picks are use for a multitude it things:
The Treasure Hunter Title
The Lucky Title
And….will just to open chests…DUH

ok now for the details
Use Lock Picks to open low level chests to work on your Lucky Title.
Just make sure you check your %Retention rate.

Use the Lock Picks to open High End chests (the key have to cost 600 gold or better)
to work on your Lucky and Treasure Hunter Title

Good Luck