Limited lifetime warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Easy to secure and Share your keys: great solution for airbag and home rental. Gives easy access to care takers and home workers. Ideal to share keys with your family or roomates. Ideal for set of keys: exterior dimensions (H x W x D) 11, 9cm x 8, 5cm x 3, 6cm; Interior dimensions (H x W x D) 9, 2cm x 6, 4cm x 3cm. Durable design: lockable key storage designed for installation to a wall or other fixed object; metal body construction for durability and shutter door to protect combination dials from weather. Ease of use: resettable 4 digit combination for keyless convenience, set and reset your combination allowing thousands of personalized combination code options. Simple installation (mounting kit included). Lock box application: for indoor and outdoor use; wall mount key safe is best used for Key and access card storage; Large internal cavity allows secure storage for multiple keys.