Master Lock 5400EC Black
Score: 78/100
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 5400EC is a versatile, portable key safe that offers reliable mechanical security for up to five standard keys. Its primary trade-off is the vulnerability of its shackle to cutting tools and limited capacity for bulky items. It is best suited for realtors and homeowners needing temporary, flexible access solutions.
| Attribute | | |
|---|---|---|
5 keys | 8 keysbest | |
15.8 cmbest | 12.7 cm | |
8.3 cm | 11.43 cmbest | |
3.8 cm | 6.6 cmbest | |
| ↓ lower better | 0.45 kgbest | 0.54 kg |
36 mmbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Installation & Mounting(1) | ||
Mounting Type | over_the_knob_wall_mount | wall_mount |
Storage & Capacity(1) | ||
Key Capacity (keys) | 5 keys | 8 keys |
Design & Fit(3) | ||
External Height (cm) | 15.8 cm | 12.70 cm |
External Width (cm) | 8.3 cm | 11.43 cm |
External Depth (cm) | 3.8 cm | 6.60 cm |
Build & Design(2) | ||
Body Material | metal_plastic | metal |
Product Weight (kg) | 0.45 kg | 0.54 kg |
Security & Access(1) | ||
Lock Type | mechanical_dial | pushbutton |
Products in the top-left offer the best value (high score, low price).
Professional reviewers consistently rate the Master Lock Key Lock Box as a top pick for realtors and homeowners, praising its balance of security, capacity, and price.
Everyday users express high satisfaction with the product's reliability for granting temporary access to service providers, pet sitters, and cleaners.
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.
“Perfect for dog walkers/cleaners-combo never fails in rain”
“Dial gets stiff in cold; needs WD-40”
“you can see how much space is still in here”
