A handle set that allows you to open both the dead bolt and latch from inside with a single motion is convenient and could be a lifesaver in an emergency. Another terrific convenience is universal keying, which allows you to carry one house key despite having installed locks on other doors from different makers. Interior doors . Grade 3 security is sufficient. But you might want a model with a latch kickoff that keeps the door from accidentally locking behind you.
Interior locks cost considerably less than exterior locks.
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