When it comes to one of the oldest locks that locksmiths are still using in this category pin tumbler and the padlocking system suits well. Pin tumbler lock is the oldest lock that still locksmith use by making them most appropriate and advance. They do so by introducing various kinds of modification and up-gradation over it. Now days pin tumbler locks in terms of design look similar to older ones but the internal part of it is getting changed to almost thirty to forty percent. When it comes to the padlocking system, it is considered as the successor of the pin tumbler lock. It is also an older kind of locking concept still locksmiths are using. A padlock is the most time used locks by locksmiths and locksmiths mainly promote its use specifically within the residential kind of areas. Locksmith Astoria prefers both these kinds of locks mainly for securing apartments of various kinds.