Lock system

A tumbler for a lock, said tumbler comprising:

• a first section having a first diameter and a first contact point;
• a second section having a second diameter greater than said first diameter, and having a second contact point;
• and
• a ledge defined between said first section and said second section such that said second contact point is defined on said ledge.

A key for use in a lock comprising a tumbler, the tumbler comprising a first section and a second section, the first section having a first diameter and a first contact point, the second section having a second diameter greater than the first diameter and a second contact point, the key comprising:

• a bow;
• a blade associated with said bow, said blade comprising a first surface and a pathway defined in said first surface, said pathway comprising a plurality of contact points, one of said plurality of contact points configured to contact the second contact point of the tumbler;
• and
• a channel defined in said first surface and extending through said pathway, said channel configured to accommodate the first section of the tumbler therein.