This device is designed to securely store keys outdoors, typically mounted on a wall near an entrance. It features a resettable 4-digit combination lock, offering up to 10,000 possible combinations for enhanced security. The robust construction, often made of materials like zinc alloy, provides resistance against weather conditions (waterproof, rustproof) and physical tampering like hammering, sawing, or prying. A sliding cover often protects the dials from environmental elements.