Keyed Differ Systcm (KD): Each padlock is keyed differently. 30,000pcs individual padlocks is available. It's one of the lowest open each other rate inthe lock core technology on the market currently, lower than using dentate key whose open each other rate is about 1/5000.
KA
Keyed Alike System (KA): Each padlock is keyed the same. 1 key will open all padlocks in each group.
MK
Differ&Master Key System (MK): A master key will override and open any of these padlocks. In the group with I master key, 190pcs of sub key can't open each other padlocks, and every master key can't open each other, either. In the group with I master key, there are 10pcs (or below 10pcs) of sub key that can't open each others, the master key can be used for 100groups and each master key can't open each others. In the group with I master key, 2,000pcs of sub key can't open each others, the open each rate is 5/10,000.
GMK
Alike&Master Key System (KAMA): Each padlock is keyed the same in one group. A master key will override and open all groups of alike keyed. If need the master key, please inform us.