Master Lock 5423EC
Score: 75/100
Master Lock 5440EC
Score: 85/100Rankings
The Master Lock 5440EC is a portable, smart key lock box designed for realtors and property managers who need flexible, temporary access control. Its key strength lies in its Bluetooth connectivity and app integration, allowing for tamper and low-battery alerts. While it lacks the permanent stability of wall-mount options, it is ideal for short-term rentals and property showings.
The Master Lock 5423D is a wall-mount push-button combination lock box designed for the secure, permanent storage of up to five keys. It features a durable metal body and a customizable alpha/numeric keypad with large buttons for low-light usability. It is best suited for homeowners and landlords needing permanent, secure key storage at fixed locations.
| Attribute | | |
|---|---|---|
5 keysbest | 5 keysbest | |
11.7 cm | 12.2 cmbest | |
7.9 cm | 8.3 cmbest | |
5.2 cmbest | 2.9 cm | |
| ↓ lower better | 0.91 kg | 0.5 kgbest |
— | 46 mmbest | |
— | 1 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Durability & Environment(1) | ||
Weather Resistance Rating | waterproof | Weather resistant to -40° |
Installation & Mounting(1) | ||
Mounting Type | wall_mount | Portable over-the-knob |
Design & Fit(3) | ||
External Height (cm) | 11.7 cm | 12.2 cm |
External Width (cm) | 7.9 cm | 8.3 cm |
External Depth (cm) | 5.2 cm | 2.9 cm |
Build & Design(2) | ||
Body Material | metal | Molded body with vinyl-coated shackle |
Product Weight (kg) | 0.91 kg | 0.5 kg |
Support & Warranty(1) | ||
Warranty Length (years) | lifetime years | 1 years |
Smart Features(1) | ||
Smart App Compatibility | none | Master Lock Vault Home and Enterprise Apps |
Security & Access(1) | ||
Lock Type | push_button_keypad | 4-digit combination |
Products in the top-left offer the best value (high score, low price).
Search results lack dedicated expert reviews from major publications like Wirecutter or Consumer Reports. However, retailer specifications from Lowe's and Home Depot emphasize the product's durability, ease of combination setting, and weather resistance.
Direct user reviews are not present in the provided data. Common praise in similar Master Lock listings focuses on simple installation and reliable access.
Master Lock's official descriptions characterize the 5400D as a reliable key safe for home or rental use, emphasizing its secure, keyless access and anti-jamming design.
Official notes imply user-friendly operation and convenience for rentals and real estate, suggesting positive reception for its intended temporary access use cases.
