Master Lock 5406D
Score: 75/100
KeyGuard SL-590
Score: 80/100Rankings
The KeyGuard SL-590 is a wall-mounted, weather-resistant key storage lock box with a heavy-duty metal frame and large capacity for up to 8 keys. Its primary drawback is the risk of permanent lockout if the combination is forgotten. It is well-suited for realtors and property managers needing secure, fixed key access.
The Master Lock 5406D is a portable, over-the-knob key lock box featuring a durable metal body and a set-your-own 4-digit combination. It is designed for users who need a robust, cost-effective solution for temporary key storage without the need for smart features. It is best suited for real estate agents and homeowners who prioritize durability and portability over advanced connectivity.
| Attribute | | |
|---|---|---|
5 keys | 8 keysbest | |
13.34 cmbest | 12.7 cm | |
6.99 cm | 11.43 cmbest | |
3.81 cm | 6.6 cmbest | |
| ↓ lower better | 0.32 kgbest | 0.54 kg |
35.71 mmbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Durability & Environment(1) | ||
Weather Resistance Rating | Yes, with weather cover | weather_resistant |
Installation & Mounting(1) | ||
Mounting Type | Portable, Over-the-knob | wall_mount |
Storage & Capacity(1) | ||
Key Capacity (keys) | 5 keys | 8 keys |
Design & Fit(3) | ||
External Height (cm) | 13.34 cm | 12.70 cm |
External Width (cm) | 6.99 cm | 11.43 cm |
External Depth (cm) | 3.81 cm | 6.60 cm |
Build & Design(2) | ||
Body Material | Durable metal body with vinyl-coated shackle | metal |
Product Weight (kg) | 0.32 kg | 0.54 kg |
Security & Access(1) | ||
Lock Type | 4-digit numeric | pushbutton |
Products in the top-left offer the best value (high score, low price).
Sources lack dedicated expert reviews from major testing organizations. Manufacturer descriptions emphasize reliability for real estate and rentals, highlighting the anti-jamming cavity, weather protection, and portability as strengths for home and rental use.
Limited consumer feedback is available, with one noted 5-star review praising key capacity and ease of use. Common praise is inferred to center on the convenience of storing house keys and the portability of the device.
Professional reviewers at CLKsupplies commend the KeyGuard SL-590 for its robust heavy-duty metal frame and impressive internal storage capacity, noting the effectiveness of the weather guard.
Everyday users and reviewers generally praise the product for its excellent storage capacity relative to its size and its durable construction that withstands outdoor elements.
“you can see how much space is still in here”
