Since the invention of code machines,depth keys have pretty much become obsolete.However everyone cannot afford such a machine so depth keys can allow those without one to code cut keys on standard duplicator.But unfortunately most suppliers who sell them offer a rather limited selection,so I thought I'd inform everyone of this one which offers depth key sets for numerous commercial,residential,padlock and automotive locks.Hope this helps
http://www.hawleylocksupply.com/Merchan ... _Code=BAXG