Keyed Different (KD)
Each padlock has its own unique key. This is the default keying for all standard rekeyable products unless requested otherwise.
Master Keyed (MK)
Each padlock has a unique key that cannot be used to open the other padlocks, but there is a “master” key that can open all of the padlocks in the group.
Keyed Alike (KA)
All padlocks in the group can be opened with the same key, offering convenience and eliminating multiple keys for those who use numerous padlocks.
Grand-Master Keyed (GMK)
This system uses two or more “master” key sub-groups where all the padlocks can be opened by a “grand-master” key. However, the sub-groups remain independent of each other.