The Sterling KeyMinder 4 features a new large ergonomic design with big easy to use dials and a heavier body for maximum protection against attack. It has large dials for easy entering of combination and suitable for storage of door, padlock & car keys. Inside, it also has a magnetic key holder. Can also be used indoors as a small safe for valuables & credit cards. Maximum key length 12cm. Ideal for School children, cleaners, wardens, community care, rental properties, maintenance personnel. 10,000 resettable combinations with 0-0-0-0 auto stop aids opening in poor lighting.