Simplex 900 Keyless Entry Lock
The simplex 900 is a residential keyless entry deadbolt style lock. These are common secondary locks on residential doors throughout the United States.
The 900 series is available in several different models.
1. Spring Bolt deadlocking with latch hold back feature.
Deadlocking basically means that it can not be "jimmied" open with a credit card.
The latch hold back feature allows you to lock the latch in the withdrawn position so you can enter and exit without dealing with the lock. This is great when you have company coming and going for the holidays.
Opening the lock is an easy process. When the correct combination is entered the inside mechanism will release and allow you to turn the centre thumb turn and withdraw the spring loaded latch or deadbolt. Some of the locks will automatically relock and some you will need to lock manually after you close the door.
This type of Simplex has been around for years and is still available online and at locksmiths throughout the United States.
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