Klucze do zrozumienia zamków rurkowych
 

Angielska książka, w której jest wyjaśnione działanie zamków rurkowych i jak je otwierać.

Krótkie podsumowanie:
 

For the first time, a manual on the three most popular tubular locks that are used on vending machines, coin operated washers and dryers, coin changers and burglar alarms. Internal construction is fully covered as well as how to open the locks by drilling and impressioning.