this lock is very common in many places all across America. its often installed in very sensitive areas that should have far greater security than it affords. theres a very simple way to bypass it. and another problem is, it is often installed by people who are not locksmiths and either dont know how or are too lazy to change the factory combination. id say in my 20 years of locksmithing, about half of the ones ive worked on still had the factory combo. so. who knows either the factory combo or the other way to get around this lock? first one to get both right wins the internet for the day.