1. SUPER DURABLE MATERIAL:This combination lock box is made of rust-resistant zinc alloy and heavy duty steel locking mechanism and this material can protect the lockbox for keys outdoor from hammering, sawing, prying, etc. Lock box for house key is a durable and reliable key safe box to hide a key.2. SECURE STORAGE: This 4-digit key lock box can be reset from 10000 kinds of combinations, which enable you keep your keys safe and securely share the access to your keys with who you allowed them get into your house when you are at work or on vacation. NO more hiding keys under doormat, or carpet. 3. WEATHERPROOF: This lockbox for keys outdoor is rust-proof, corrosion-resistant and waterproof, for indoor and outdoor use. Lock box with combination lock also comes with sliding shutter cover to protect the combination dials from rain, snow, jamming or freezing in outside hide a key. Making security lock boxes stronger and use many years.4. EASY TO INSTALL: With 4 digit combination for key lock box and you can set and reset your personalized password(please take photo) .Instruction guide takes your through steps to re-set your access code at any time.5.If you have any questions, please contact us promptly