DKX Series Type II High Security Pedestrian Door Lock. As a trusted partner of the United States Government, Kaba Mas high security combination locks are used for GSA approved security containers. The DKX series pedestrian door locks are used on doors to secure rooms as well as Secure Compartmented Information Facilities (SCIFs). Both Kaba Mas products have been trusted and preferred selections by U.S. Government agencies and Government contractors since our X-0 series was introduced in 1992.