Haken Systems Digital door locks offer a hassle-free contemporary solution for increased security, reliability and practicality. The administration of key based locks can cost a significant amount of time and money, often requiring the expense of a professional locksmith. Keys can be lost, stolen or copied, which can compromise security. The inconvenience of not gaining access to storage furniture is often considerable. Even when things go well, the time involved in re-issuing keys, managing key deposits and administering multiple users, is significant.