Why we need a secure key storage lock box? With a lock box with a key, you don't need to carry your locker locks anymore or hide them under the carpet, flowerpot, or doormat, only a 4-digit combination to get into the house; It is really convenient for daily outdoor sports, friends, relatives and latchkey kids, home services at given time, emergency entry, real estate business. Tips: Please make sure record your password by taking a photo or note after every time reset the password, otherwise, you have no way to get it back. It's NOT recommended to use combination such as "0-0-0-0", otherwise it might be easily cracked. Please keep the shutter door closed for weather, dirt and grime resistance. It is recommended to rotate the dials weekly to keep them work properly. Features : This key lockbox made of zinc alloy, it is providing powerful resistance to cutting, hammering and sawing. And it is non-corrosive, durable, and weatherproof. The 4-digit combination provides 10,000 unique choices, which makes the key storage box have high security for protect your keys. And access to your house keys for school kids, friends, home service, and emergency entry. It is also a perfect solution for key storage in the real estate business. You can also use this key lock box in the warehouse, garage, office, etc., and no need to buy several keys for one lock if many different persons need to open the lock. Specification : Material: Zinc Alloy Color: Black + Grey Install Method: Wall Mounted or hang it with shackle Overall Size with Shackle: 3.54*1.58*7.48 inches / 9.0*4.0*19.0 cm Overall Size without Shackle: 3.54*1.58*4.73 inches / 9.0*4.0*12.0 cm Internal Size: 2.64*1.38*3.54 inches / 6.7*3.5*9.0 cm Package Included: 1 x Key Lock Box 4 x Heavy-duty screws 4 x Plastic expansion plugs 1 x User manual