On Thu, 8 Nov 2012 00:37:11 -0800 (PST), wrote:

http://wiki.diyfaq.org.uk/index.php?title=Eurolock

Looked at that, and find a bit missing: in sizing, the first number is (as a
rule) the "outside" length. This is important because some better cylinders have
security features on the "outside" side, like a hardened face or pins, or
pull protection.


Thomas Prufer