Secure storage: up to 5 house or car keys. Service technicians and pet sitters while you're at work or on vacation. The perfect solution for storing your keys. Super Durable Material: Made of rust-proof zinc alloy, suitable for outdoor use, non-corrosive and weather-resistant. It also comes with a sliding shutter cover to protect the combination dial from the elements 4-digit combination dial: allows you to personalize your own access code. Store your keys safely inside and the instruction guide will walk you through the steps to reset your password at any time. Easy to install: Includes all necessary mounting hardware: 4 screws and 4 nylon expansion wall anchors to ensure the key safe can be mounted on any solid surface AND GUARANTEE: If you don't, it's guaranteed to us within 45 days Very satisfied with the key storage box.