Sell security AB-key lock for door

security AB-key lock for door You May Also Be Interested In: security key
Anti-X-key's AB-key lock.
A lock or A door controlled by different keys in different scurity levels, X-key or tools can not open it.
Different keys can control one lock. There are A-key, B-key and C-key etc. In a door, A-key controls one part of the tongues; B-key controls two parts of the tongues, include A-key's; C-key controls all of the tongues, include A-key's and B-key's.
If the door closed by force or wind, it can be opened by A-key or B-key or C-key, it also can opened by handspike; If the key mislay in home, it also can be opened by specialized work with some tools.
When the door locked by B-key, it can be opened by B-key or C-key, A-key can't open it. And specialized work or thief is very difficulty open it by special tools.
When the door locked by C-key, it can only opened by C-key, the A-key and B-key can't open it. And specialized work or thief can't open it by special tools.
A-key can used to a decorator, B-key can used to a house hirer. C-key can used to a house owner.
It can be produceed in to many kinds and types , such as night lock or magnetic combined lock or keyhole encoder lock or key coding lock etc. . . , easily manufacture, conveniently use and more safely.
Chinese patent No:012724858, 200320110001.9, 200420079073.6, 200420079608. x , It could produce out about 100 kind locks and relative products.
Would like cooperate or invest whith my product?There will be hight profit for you! Connect me please.
Dimensions
10x15x2
Patents or Trademarks
patent233020110001.9,01272485
Weight
2