The conventional deadbolt has been one of the most popular types of house locks for a long time. Some people also consider it to be one of the industry standards when it comes to house locks. The basic mechanism of conventional deadbolts is typically a single-cylinder design. A deadbolt lock can be opened using a key that is turned from the outside. There is also a thumb turn on the inside of the lock. If you live in a relatively peaceful neighborhood and would want to have added peace of mind, investing in a traditional deadbolt lock should be sufficient. It is straightforward and covers all the fundamentals.