Industrial strength combination lock from the leader in top of the line security solutions, Kaba Ilco. Kaba has been making high quality security products for over 100 years. For a security lock, the highly weather resistant Simplex® 5000 Series earns a Grade 1 rating from ANSI. (American National Standards Institute) This marks the highest rating they give out for quality. Your Simplex 5000 grants entry upon successful validation of a 1 to 5 digit sequential code which you pre-program into the lock. Vandal protected, the Simplex® series of PIN based locks find widespread acceptance in high-traffic commercial, institutional, and government buildings.