The following are photos of lock opening tools. You will notice that there are also engineering drawings as well.
The photos are from the LSS+ CD, The drawings are taken from US Patents...
So far I have collected over 100 patents that I have studied .... You will find both drawings and descriptive text, if you like this sort of thing, in the letters patent.
For example
Here are 2 pics from the Locks Safes and Security Site showing a pickgun


Here is a picture of a manual lockpickgun

Here is a picture of one type of snappick

If you really want to learn about it check the patents out on the United State Patent Office search site ....its free.
http://patft.uspto.gov you can try patent 4156375 as a start