On 04/02/08 12:11 am mm wrote:

What is the difference between sgl cyl & dbl cyl? -- Thanks

One is a seagull cylinder and the other is a Double Stuff Oreo
cylinder.

With double, if someone breaks in through a window, they can't unlock
the door to carry things out.

Also, if you have windows in that very door, they can't break the
glass and unlock the door.

I put in double when I had an apartment, because the fire escape was
accessible to others. But I never locked that deadbolt when I was
home, because I didn't want to depend on finding the key if there was
a fire, or if I were in a hurry. Even with various roommates, it was
easy to get them to follow the same rule. (and they weren't very good
learners otherwise.)


A few years back I lamented that I had been unable to find locks like
the lock (maybe Yale) I had on my front door in Australia: one did not
need the key to lock it, but, once the button was pressed and the door
was closed, the deadbolt tripped, so that the key was needed to open it
either from the inside or from the outside.

I was told that a lock that could not be opened from the inside without
a key was a safety hazard in the event of a fire and was a violation of
the Code.

Perce