Find Your Perfect Fit

What Fits Inside Your Lock Box?

Choosing the right lock box size ensures your valuables fit securely and comfortably. Below you’ll find the internal measurements and examples of what typically fits inside each Iron Lock® model.

Small Lock Box

Small Lock Box

Internal Dimensions: 2.75” (W) × 3.25” (H) × 1” (D)

What Fits Inside:

  • 2–3 standard house keys
  • Small folded paper with access or gate code
  • Slim key tags or flat keychains
  • Thick or bulky keychains (if organized properly)

What Doesn’t Fit:

  • Car keys or key fobs
  • Garage openers

Best Use:

Perfect for securely storing standard keys in a compact, durable design. Ideal for homeowners, renters, or Airbnb hosts who want simple, reliable access sharing without extra bulk.

Medium Lock Box

Internal Dimensions: 2.5” (W) × 3.5” (H) × 1.2” (D)

What Fits Inside:

  • 4 or more standard house keys
  • Most key fobs and some car keys
  • Credit cards, access cards, or small folded documents
  • Slim or moderately bulky keychains

What Doesn’t Fit:

  • Extra-large car remotes or thick garage openers

Best Use:

A versatile and practical option for everyday access sharing. The medium size offers extra room without being bulky — ideal for realtors, short-term rentals, or anyone needing a bit more storage flexibility.

XX-Large Lock Box

Internal Dimensions: 3.1” (W) × 4.3” (H) × 1.6” (D)


What Fits Inside:

  • Multiple sets of house keys
  • Large key fobs and car keys
  • Credit cards, access cards, and small wallets
  • Small garage remotes or entry gate openers or keychains

Best Use: Perfect for commercial properties, logistics, and trucking fleets — the XX-Large Lock Box provides the extra space you need without compromising on strength or reliability. Whether it’s for multi-unit access, business operations, or vehicle key management, this heavy-duty model offers exceptional capacity and durability, making it the ultimate choice for professional and high-demand environments.