A lock box with a code can store cash, spare keys, or important documents without relying on a traditional key. The KYODOLED small cash box is best for compact cash storage, while its larger model suits users who need more sorting space. For spare keys, the Master Lock is designed for outdoor access, and the Puroma offers hanging or wall-mount installation. The ZOOPIP file box is best for organizing documents and keeping them out of casual reach.
| Product | Best For | Lock Type |
|---|---|---|
| KYODOLED Small Cash Box | Compact cash storage | Resettable 3-digit combination |
| KYODOLED Large Cash Box | More cash and item organization | 3-number combination |
| Master Lock 5400EC | Outdoor spare-key access | Resettable 4-digit combination |
| ZOOPIP Fireproof File Box | Documents and small essentials | 3-digit combination |
| Puroma Outdoor Key Lock Box | Mounted or hanging key storage | Resettable 4-digit combination |
KYODOLED Small Cash Box

This compact metal cash box measures 7.87 x 6.30 x 3.35 inches and has a built-in carry handle. Its removable tray separates coins and compact items from the lower compartment, which can hold folded bills, receipts, and other small essentials. A resettable three-digit combination replaces a keyed lock; the listed factory code is 000.
Best for: People who need a portable, space-conscious box for cash at home, work, or temporary selling events. It was selected for its manageable dimensions and separate storage levels.
Consider: The three-digit code has fewer possible combinations than the four-digit options in this comparison. Follow the listed reset steps carefully and center each dial precisely when setting a new code.
KYODOLED Large Cash Box

The larger KYODOLED box measures 9.84 x 7.87 x 3.54 inches. Its removable tray has five compartments for sorting cash, coins, and keys, with additional space below for checks, receipts, or other valuables. The three-number combination lock can be set or changed, so users do not need a physical key to open the box.
Best for: Users who want more room and compartmentalized organization than a small cash box provides. The larger footprint and five-section tray make it a better fit for handling several types of cash or small items.
Consider: Its larger size takes up more shelf or drawer space than the compact KYODOLED model. The product information describes everyday cash-box storage, not a specialized fire- or water-protection enclosure.
Master Lock Portable Key Lock Box

The Master Lock 5400EC is a key-storage box that holds up to five standard house keys. It uses a resettable four-digit combination and has a metal body with a protective shutter over the dials. These features are intended for outdoor placement and controlled access for family members, renters, contractors, or cleaners.
Best for: Households or property managers who need to share access to spare keys without leaving one under a mat. It is the clearest choice here for storing keys outdoors rather than organizing cash or documents.
Consider: Capacity is limited to five standard keys, so it is not intended as a general-purpose storage box for larger belongings. Outdoor construction does not eliminate the need to choose a discreet, appropriate mounting location.
ZOOPIP Locking File Box

This collapsible document organizer measures 12.2 x 6 x 10.2 inches and is designed to hold letter-size documents. It includes a main compartment, ten card holders, four outer side pockets, and a passport mesh bag. A double-zipper, three-digit combination lock can help keep documents and small items away from casual access. The listed materials include silicone-coated fiberglass and a PP board structure.
Best for: People organizing paperwork, passports, cards, photos, or similar items in a home office. It offers more document-specific organization than either metal cash box.
Consider: Its soft-sided, collapsible format differs from a rigid metal lock box. The combination feature is for access control; do not assume it provides protection against theft or every fire or water event.
Puroma Outdoor Key Lock Box

The Puroma key box uses a resettable four-digit combination, with 10,000 possible combinations listed by the manufacturer. It can hang using its removable shackle or mount to a wall with the included screws and expansion plugs. Its aluminum-alloy and steel construction is described as rustproof and resistant to cutting and forceful damage.
Best for: Buyers who want a choice between hanging a key box and fixing it to a wall. The four-digit code and two installation methods make it a flexible option for home or office key access.
Consider: The box arrives set to 0-0-0-0, so change the code before relying on it for access control. Check the mounting surface and installation location before choosing between the shackle and screws.
Buying Guide: How To Choose A Lock Box With A Code
What do you need to store?
Match the box to the contents. Choose a cash box for coins, bills, receipts, and small items; select a key safe for spare keys; and consider a file box when letter-size papers and cards need organized storage. A key safe is not a substitute for a larger storage box, and a cash tray may not suit documents.
Do you need three or four digits?
A three-digit lock is straightforward and appears on both KYODOLED boxes and the ZOOPIP file box. The Master Lock and Puroma use four-digit codes. Product details specify 10,000 possible combinations for the Puroma, while the Master Lock description notes thousands of options. Choose a code you can manage securely, and store it somewhere separate from the box.
Will the box stay indoors or outdoors?
For spare keys exposed to outdoor conditions, compare the Master Lock’s protective dial shutter with the Puroma’s mounting choices and stated metal construction. For indoor cash or papers, size, compartment layout, and portability may matter more. No combination lock should be treated as a guarantee against forced entry.
How much organization and installation do you need?
Removable trays help separate coins and small items, while the ZOOPIP’s pockets and document compartment suit paperwork. For key access, decide whether hanging or wall mounting fits the location. Always follow the product’s code-setting instructions and test the new combination before closing the box for regular use.
Frequently Asked Questions
What is a lock box with a code used for?
It stores selected items behind a combination lock. Common uses include keeping cash organized, sharing access to spare keys, or limiting casual access to documents.
Can I reset the combination on these products?
The listed models have resettable or changeable combinations. Use the instructions for the specific product, and confirm the new code works before closing the box.
Which option is best for outdoor spare keys?
The Master Lock 5400EC and Puroma are designed for key storage. The Puroma provides hanging or wall-mount installation, while the Master Lock description highlights a shutter protecting the dials.
Which lock box is best for cash?
The KYODOLED boxes are designed for cash organization. Choose the small model for a compact footprint or the large model for a five-compartment tray and more storage space.