The Combination Key Lock Box with Door Hanger and Wall Mount by Barska is a versatile and heavy-duty security solution for storing keys outside or in public spaces. Whether you hang the Combination Key Lock Box around a door handle or mount it to a wall, the protective rubber and foam surfaces covering the shackle & back side will ensure that it will not damage the surface of what it's attached to. The 4-digit code can be customized and reset, ensuring that only authorized users with the current code can open the lock box. The shutter provides enhanced weather protection and potential dirt & debris resistance for the combination dial.