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Master Lock 5400EC Black — Review & Specs | Pricepect | Pricepect

Home Key SafesMaster Lock 5400EC Black

Master Lock 5400EC Black — image 1

Master Lock

Master Lock 5400EC Black

Expert Review Analysis

The Master Lock Key Lock Box is a portable or wall-mountable outdoor key safe designed for secure, temporary storage of house keys or access cards. It features a set-your-own 4-digit combination dial or push-button entry, weather-resistant construction, and a vinyl-coated shackle to prevent surface damage. These units are best-sellers for shared security, typically holding up to 5 standard keys in compact forms.

✓ Best for: Realtors showing multiple properties daily, homeowners granting temporary access to cleaners or pet sitters, rental owners managing Airbnb guests, and service professionals like HVAC technicians or plumbers. Specific use cases include doorknob mounting for vacation homes, wall-mounting for gates or fences at job sites, low-light night use with light-up models, and high-volume key storage for real estate teams.✗ Not ideal for: High-security applications requiring valuables storage, very cold areas without regular maintenance to prevent dial stiffness, and users needing to store bulky car remotes or large key fobs that exceed the interior capacity.

Pros

✓Extremely durable in weather conditions ranging from -20°F to 120°F without freezing issues
✓Easy combination setup with large dial visibility and resettable 4-digit codes

Best Seller Rank History

Now#2Best#1Worst#22

Lower = better sales rank

Specifications

Design

Exterior Height6.25 inches (158 mm) mm

Exterior Width3.25 inches (83 mm) mm

Exterior Depth1.5 inches (38 mm) mm

Interior Height1 inch (25 mm) mm

Interior Width2-13/32 inches (61 mm) mm

General

BrandMaster Lock

Model5400D

ColorBlack

WarrantyLimited Lifetime Warranty

Mounting TypeOver-the-knob, Wall-mount

Security

Picking ResistanceVulnerable to picking by experts in under 1 minute

Durability

Cycle ResistanceWithstands 500+ open/close cycles

Temperature

Operating RangeSurvives -20°F to 120°F without freezing

Dimensions & Weight

Height6.25 inches

Width3.25 inches

Depth1.5 inches

Weight1.0 Pounds

Research Sources

masterlocklatinamerica.com

store.masterlock.com

store.masterlock.com

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Master Lock 5400EC Black vs Rudy RUN Lock Box

User Reviews

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4.7

(25,191 reviews)

$32.70

5400DBlack1 Pack Limited Lifetime Warranty

✓Secure anti-jam interior design praised for holding 5+ standard keys reliably

✓Portable design with vinyl-coated shackle that fits 90% of standard doorknobs

✓Spacious interior cavity prevents key jamming and accommodates standard 2-inch keys

✓Durable molded plastic or metal bodies suited for real estate and rental properties

Cons

✗Combination mechanism can wear out after 1-2 years of heavy use
✗Small interior size limits storage for bulkier keys or car remote fobs
✗Shackle can be opened with bolt cutters in under 20 seconds
✗Dial mechanism may become stiff in cold northern climates requiring maintenance
✗Combination codes may drift or become inaccurate after one year of use
✗Vulnerable to picking or shimming by experts in under one minute

From Expert Reviews

Praised by Experts

✓Best balance of security, capacity, and price for realtors and professionals
✓Weatherproof performance in Midwest winters and extreme temperature fluctuations
✓Durable plastic withstands 500+ open/close cycles without structural failure
✓Large cavity beats competitors in holding capacity for standard house keys
✓Survives outdoor exposure better than metal rivals with no rust after six months
✓Removable shackle allows versatile mounting options for different installation needs

Criticized by Experts

✗Vulnerabilities to picking and shimming identified in professional security tests
✗Not theft-proof as shackle opens quickly with standard bolt cutters
✗Limited security rating compared to high-end professional or smart alternatives
✗Not ideal for high-security applications requiring valuables storage

From User Reviews

Users Love

✓Combo mechanism never fails in rain, making it reliable for dog walkers and cleaners
✓Holds 5 keys easily with no jamming issues reported after two years of use
✓Easy installation on doorknobs allows kids and friends access without physical keys
✓Light-up dial feature is ideal for night use and late arrivals at properties
✓Versatile mounting options for gates, fences, and job sites using wall mounts

Users Complain About

✗Dial gets stiff in cold northern climates and requires WD-40 lubrication
✗Too small for large keys or bulky car remotes that do not fit well inside
✗Shackle is too thin and can be cut with cheap tools by security-conscious users
✗Combination drifts or becomes inaccurate after one year of regular use
✗Small size limits bulkier keys and fobs from fitting properly in the cavity

Expert Opinion

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. Wirecutter highlights its reliability in holding five keys and weatherproofing in harsh winters, though it notes vulnerabilities to picking. Consumer Reports awards it high marks for ease-of-use and build quality, noting it withstands hundreds of cycles. This Old House and Bob Vila recommend specific models like the 5400D and 5480D for their durability and versatile mounting options, positioning them as the gold standard for house key safes compared to cheaper alternatives.

What Users Say

Everyday users express high satisfaction with the product's reliability for granting temporary access to service providers, pet sitters, and cleaners. Common praise focuses on the ease of installation on doorknobs and the ability to hold multiple keys without jamming. However, recurring complaints highlight issues with the dial becoming stiff in cold weather, the small interior size excluding bulky car keys, and concerns about the shackle's security against cutting tools. Users also report that combination codes may drift over time, requiring adjustments.

Common Complaints

Dial stiffness in cold weather requiring lubrication, small interior size excluding bulky keys, shackle vulnerability to cutting tools, and combination code drift after extended use.

What People Are Saying

“Perfect for dog walkers/cleaners—combo never fails in rain”
5/5 ★Real estate agentsNov 2025

“Holds 5 keys easily, no jamming after 2 years”
5/5 ★HomeownersNov 2025

“Easy install on knob, kids/friends access without keys”
5/5 ★RentersNov 2025

“Dial gets stiff in cold; needs WD-40”
3/5 ★Northern climate usersNov 2025

“Too small for large keys; combo drifts after 1 year.”
3/5 ★UsersNov 2025

“Shackle too thin—cut with cheap tool”
2/5 ★Security-conscious usersNov 2025

How It Compares

vs. Kidde AccessPoint

Advantages

✓Master Lock holds up to 5 keys compared to Kidde's 3-5 key capacity
✓Master Lock offers better weatherproofing with no freezing issues

Disadvantages

✗Kidde may offer a cheaper build option for budget-conscious buyers

Choose Master Lock for higher key capacity and better weather resistance; choose Kidde for a lower-cost alternative.

vs. Supra C500

Advantages

✓Master Lock is more consumer-friendly and easier to use for general homeowners

Disadvantages

✗Supra offers higher professional-grade security standards for realtors

Choose Supra for maximum professional security; choose Master Lock for ease of use and consumer reliability.

vs. Igloohome Smart Padlock

Advantages

✓Master Lock does not rely on batteries, avoiding cold-weather battery failure issues

Disadvantages

✗Igloohome offers app-based tracking and higher tech security features

Choose Igloohome for smart tech features and app tracking; choose Master Lock for simple, battery-free analog reliability.

Rating Trend

Rating4.7/ 5Reviews25,255+2,150 reviews

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