SL-591 Portable Car Lock Box - Secure Key Safe for Car Sharing

In this review the SL-591 Portable Car Lock Box is evaluated as a compact, keypad-based key safe aimed at hosts and drivers who need a simple, contactless way to exchange keys. The single biggest reason to buy is its straightforward push-button keypad and full metal body that combine to make a no-fuss solution for rideshare, car rental hosts and homeowners who want a dedicated place to leave keys and small valuables near a vehicle. It is not high-tech, but it delivers a practical, mechanically secure option when ease of use and weather protection matter.

Key Features

• Multi-purpose lock box: Provides convenient storage for keys, fobs, garage openers, cards and small valuables to support rideshare and car sharing use cases.
• High security construction: Full metal body and metal frame infrastructure resist tampering and external force better than plastic-only designs.
• Phone style keypad: Large punch buttons make entering and changing combinations faster and easier for users who struggle with small dials.
• Protective cover door: Flip cover hides the keypad and protects buttons from weather and casual observation for added privacy.
• Weather resistant finish: Zinc alloy with anti-oxidation coating and ABS plastic layer helps prevent corrosion and shields the car from scratches.

Who It's For

The SL-591 is best for Turo, Getaround and other car sharing hosts, landlords, or families who need a predictable, mechanical way to hand off keys without carrying spare sets. Its keypad entry and protective cover make it practical for frequent guest access and contactless pick ups.

It is less suitable for buyers who need a digital, app-controlled or remote-access lock box, or for situations that demand a very large internal compartment; several customers noted mixed impressions about internal size and long-term durability of the front flap, so those needing a heavy daily-use commercial locker may want to consider a heavier duty alternative.

Pros & Cons

Pros

• Solid metal vault construction and anti-oxidation coating provide durable, weather-resistant protection.
• Large punch-button keypad is intuitive and easy to operate for users of all ages.
• Protective cover conceals the keypad and helps prevent tampering and weather exposure.
• Automatically secures when closed, simplifying access control for hosts and guests.

Cons

• Some users report mixed durability on the front flap under heavy use, so longevity may vary by usage pattern.
• Internal volume may be small for bulky pouches or multiple large fobs, according to a few customers.

Specifications

Product name	SL-591 Portable Car Lock Box
Exterior dimensions	20 in x 15 in x 7 in
Lock type	Push-button combination keypad
Body material	Zinc alloy with ABS plastic coating
Protective feature	Flip protective cover door
Intended use	Car sharing, rideshare, rental car key storage

Our Verdict

The SL-591 Portable Car Lock Box is a practical, value-oriented choice for hosts and drivers who want a reliable, mechanical keypad safe for keys and small valuables. Its rugged metal build, protective cover and user-friendly buttons make it a sensible pick for contactless key exchanges, though those needing app control or larger internal space should look elsewhere. For most short-term rentals and personal use it represents a straightforward, secure solution.

Frequently Asked Questions

Can the combination be changed?
Yes, the combination can be changed using the provided tool so hosts can update access codes as needed.

Is the box weatherproof?
The unit is constructed with a zinc alloy and anti-oxidation coating plus a rubber cover to resist rain and corrosion, though it is not promoted as fully submersible.

Will it fit multiple key fobs?
It fits standard keys, fobs and small items, but some users find the internal volume limited for large pouches or several bulky fobs.