On Wed, 18 Nov 2009 22:59:06 GMT, The Medway Handyman wrote:

They aren't that difficult to open by going through the
combination
and fitting it at the rear out if sight gives the crook as much
time
as he needs.

Dennis, if you use 4 digits there are 10,000 possible combinations. The
GE keysafes can use up to 6 digits. It would take days to go through
them.

That depends on the mechanism. Some locks you can tell when you
select the correct digit by a very slightly different feel to the
button you push and/or how the other buttons feel.

Having 4 5 or 6 digits to select certainly makes it harder but I
doubt impossible.

--
Cheers
Dave.