Sat Apr 02, 2016 2:18 pm by Werewolf
From what I can make out , there is very little physical difference between the 2. They are even covered by the same patent.
But they seem to be pushing the Quattro S as a High Security lock for larger master key systems , and the experT for small and medium size master key systems.
BTW , i also have that book , and it's great. It's getting a bit old now (from 2007) so the very recent locks aren't covered , but overall I would highly recommend it to anyone who's into locks.
Last edited by
Werewolf on Sat Apr 02, 2016 3:15 pm, edited 1 time in total.
"Who are you and how did you get in here ?"
"I'm the locksmith , and i'm a locksmith"