
Master Lock 5401EC
Score: 72/100
KeyGuard SL-500 Black
Score: 75/100Rankings

The KeyGuard SL-500 is a portable punch-button lock box with a spacious interior and alphanumeric keypad for flexible code creation. Its main limitation is a somewhat complex setup process requiring precise button rotation. It is ideal for realtors and property managers needing temporary, portable key access.

The Master Lock 5401D is a heavy-duty, wall-mount lock box designed for the secure, permanent storage of multiple keys. It offers reliable mechanical access but lacks modern features like backlighting or smart connectivity. It is ideal for users needing permanent, weather-resistant key storage at fixed locations.
| Attribute | ![]() | ![]() |
|---|---|---|
5 keysbest | — | |
12 cmbest | 6.8 cm | |
8.3 cmbest | 2.1 cm | |
3.8 cm | 4 cmbest | |
| ↓ lower better | 0.49 kg | 0.45 kgbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Installation & Mounting(1) | ||
Mounting Type | wall_mount | shackle |
Storage & Capacity(1) | ||
Key Capacity (keys) | 5 keys | unlimited keys |
Design & Fit(3) | ||
External Height (cm) | 12.0 cm | 6.80 cm |
External Width (cm) | 8.3 cm | 2.10 cm |
External Depth (cm) | 3.8 cm | 4.00 cm |
Build & Design(2) | ||
Body Material | metal | metal_plastic_coating |
Product Weight (kg) | 0.49 kg | 0.45 kg |
Security & Access(1) | ||
Lock Type | mechanical_dial | pushbutton |


Products in the top-left offer the best value (high score, low price).

No professional reviews or editor opinions appear in the search results. Master Lock's product pages emphasize reliability for permanent outdoor use but offer no external endorsements.
No consumer reviews, praise, or complaints are included in the search results. Official descriptions note practical benefits like jamming prevention but lack user testimonials.

Professional reviewers praise the KeyGuard SL-500 for its superior storage capacity, intuitive phone-style keypad, and protective coating that prevents door scratches.
Demos simulate a positive user experience, noting the ease of fitting a handful of keys with space left over, but no recurring praise or complaints from actual buyers are documented.

