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Master Lock 5422E — Review & Specs | Pricepect | Pricepect

Home Key SafesMaster Lock 5422E

Master Lock 5422E — image 1

Master Lock

Master Lock 5422E

Expert Review Analysis

The Master Lock 5400D is a portable, over-the-knob key lock box featuring a customizable four-digit combination and a weather-resistant design with a protective cover. It is intended for quick, tool-free installation on door knobs to secure keys and access cards at residential or commercial properties.

✓ Best for: Real estate access control for property managers and rental companies. Short-term rental property management requiring frequent access changes. Homeowners needing quick, portable key storage solutions. Security gates and fences where temporary key access is needed✗ Not ideal for: High-security applications requiring resistance to picking or decoding. Users needing permanent, wall-mounted installation for added stability. Users requiring longer combination lengths for enhanced security complexity

Pros

✓Over-the-knob design allows for portable, tool-free installation without permanent mounting hardware
✓Weather cover protects the push-button dials from freezing temperatures and grime accumulation
✓

Best Seller Rank History

Now#33Best#3Worst#160 +1

Lower = better sales rank

Specifications

Design

Exterior Height6.84 inches mm

Exterior Width3.18 inches mm

Exterior Depth2.06 inches mm

Internal Height3.50 inches mm

Internal Width2.25 inches mm

Features

Key CapacityUp to 5 keys keys

Combination TypeAlpha/numeric

Control MethodTouch

Installation TypeOver-the-knob

Weather ResistanceWeather-resistant with cover

General

BrandMaster Lock

Model5422EC

ColorBlack

WarrantyLimited Lifetime Warranty

Weight1.86 Pounds g

Security

Combination Type4-digit customizable

Shackle Diameter13/32 in (10 mm)

Shackle Width1-7/8 in (48 mm)

Shackle Length1-13/32 in (36 mm)

Dimensions & Weight

Height6.84 inches

Width3.18 inches

Depth2.06 inches

Weight1.86 Pounds

Research Sources

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User Reviews

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4.4

(3,684 reviews)

$43.36$45.354% off

5422ECBlack3-1/2 In. H. x 2-1/4 In. W. x 1 In. D. Limited Lifetime Warranty

Molded body and vinyl-coated shackle prevent surface damage to doors and surrounding areas

✓Large internal cavity prevents jamming even when storing multiple keys simultaneously

✓Set-your-own 4-digit combination provides keyless convenience and customizable access control

Cons

✗Internal mechanism uses a simple sliding plate with notched rods that can be decoded without tools
✗Security vulnerability identified by experts where lock can be opened by aligning notches through button presses
✗Limited to a 4-digit combination compared to competitors offering up to 12 characters of flexibility
✗Portable design may be less secure than permanent wall-mount options for high-security environments
✗Shackle length is limited to 1-13/32 inches, restricting compatibility with thicker or non-standard knobs

From Expert Reviews

Praised by Experts

✓Over-the-knob design allows for portable, tool-free installation without permanent mounting hardware
✓Weather cover protects the push-button dials from freezing temperatures and grime accumulation
✓Molded body and vinyl-coated shackle prevent surface damage to doors and surrounding areas
✓Large internal cavity prevents jamming even when storing multiple keys simultaneously
✓Set-your-own 4-digit combination provides keyless convenience and customizable access control

Criticized by Experts

✗Internal mechanism uses a simple sliding plate with notched rods that can be decoded without tools
✗Security vulnerability identified by experts where lock can be opened by aligning notches through button presses

From User Reviews

Users Love

✓Very easy to use with straightforward operation even in challenging conditions like low light or wearing gloves
✓Practical value for property management and short-term rental properties requiring frequent access control
✓Can accommodate a good amount of keys, with capacity estimated for up to five keys without jamming

Expert Opinion

Professional assessments highlight the product's ease of use and practicality for property management, with reviewers noting it is very easy to use and suitable for homeowners. However, a critical security review by the LockPickingLawyer revealed a significant vulnerability, demonstrating that the internal mechanism's simple sliding plate with notched rods can be decoded without tools, raising serious concerns about the actual security level of this design.

What Users Say

Users generally provide positive feedback regarding the ease of use and practicality for property management. Common themes include appreciation for the straightforward operation in challenging conditions such as low light or when wearing gloves, and the value of the weather-resistant design for outdoor use.

What People Are Saying

“very easy to use”
4/5 ★YouTube reviewerNov 2025

“a good amount of keys”
4/5 ★YouTube reviewerNov 2025

How It Compares

vs. Master Lock Model 5422D

Advantages

✓5400D is slightly more compact in height (6-1/4 in vs 6-7/8 in)

Disadvantages

✗5422D offers greater combination flexibility with up to 12 characters versus 4 digits

Choose the 5400D for a more compact portable solution, but select the 5422D if longer, more complex combinations are required.

vs. Master Lock Model 5423D

Advantages

✓5400D is portable and requires no permanent installation or drilling

Disadvantages

✗5423D offers permanent wall-mount installation and a metal body for potentially greater durability

Choose the 5400D for temporary, portable key storage, but select the 5423D for permanent, fixed installations.

Rating Trend

Rating4.4/ 5Reviews3,698+344 reviews

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