: Intermediate discs used in master-keyed systems.
If a building changes ownership or security clearance levels, existing ASSA cylinders must be "repacked" to fit a new master key chart. Using the Euclid method allows a tech to reset the 10–12 pin stacks efficiently. euclid assa repack
Assuming you mean the where an app (often labeled "Euclid" or "Assa") claims to be a game but is actually a repack of another popular title (like Archero or a generic RPG) with stolen assets: : Intermediate discs used in master-keyed systems