Size: 15*10*5cm Internal Storage Space12*9.4*5 cm Material: Alloy Outdoor Installation Method: 1. Mark on the wall according to the location of the hole at the bottom of the key box. 2. Punch a hole on the wall. 3. Place the expansion tube and tighten the screws to fix it. Applicable Scenarios: 1. The key lock box is ideal for multi-person households because it can be used to store spare keys of family members or as a backup. It is also convenient to leave keys at home or for family members to use. 2. Key lockbox is useful for rental properties because it can be used to store guest or tenant keys. It is also ideal for self-occupancy, making it a popular choice for rental property owners. 3. Key lockbox is convenient for both employees and customers because it can be used to store keys for employees or contractors. It is also useful for keys left behind in a business or rental home. 4. The key lock box is great for vacation homes or cabins because it can be used to store keys for guests and renters. It is also suitable for leaving keys for guests or vacation homes. 5. The key lockbox is ideal for late arrivals for self check-in and is perfect for Airbnb hosts where applicable.