2-in-1 Key Storage & Stainless Steel Butt Plug

A hidden key box you can actually wear.

The Stainless Steel Hidden Key Box Butt Plug combines a polished stainless steel butt plug with a discreet internal key storage compartment. Simply unscrew the upper cap, place a compatible small key inside, and close it again—the key disappears completely inside the plug.

Designed for chastity keyholding, lock-and-key play, couples, and discreet key storage, this 2-in-1 design turns an ordinary key holder into something much more interesting.

Available in 30mm and 40mm diameters, with a smooth tapered shape, substantial metal weight, and a wide curved safety base.

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🔑 A Hidden Key Box Inside

The polished upper section isn't just decorative.

Twist it open and you'll find a concealed key storage compartment built directly into the plug.

Place a compatible key inside, screw the cap closed, and the key is completely hidden from view.

Perfect for storing:

• Chastity cage keys
• Small lock keys
• Keyholding accessories
• Compact padlock keys
• Other small personal keys

No one would know there's a key hidden inside just by looking at it.

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2-in-1 Design: Key Box + Butt Plug

This isn't simply a stainless steel plug with a decorative shell.

It's designed around two functions:

Hidden Key Box
A discreet internal compartment keeps a compatible small key concealed inside.

Wearable Butt Plug
A smooth tapered profile and wide flared base create a functional stainless steel butt plug design.

One product. Two functions.

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✨ Polished Stainless Steel Construction

The smooth stainless steel body gives the plug a clean, minimalist appearance with a substantial weighted feel.

The mirror-polished upper section contrasts with the softer brushed-metal body, creating a premium two-tone finish.

The tapered shape gradually increases in diameter, while the wide curved base remains outside the body for safer positioning and easier handling.

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🔄 Screw-Open Hidden Compartment

Using the hidden key box is simple:

1. Unscrew the polished top cap.
2. Place a compatible small key inside.
3. Screw the cap securely back onto the body.
4. The key is now completely concealed inside the plug.

The threaded construction helps keep the compartment securely closed during use.

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🧩 Detachable Construction

The product can be separated into multiple sections.

The upper cap unscrews to access the hidden key compartment, while the lower base can also be detached from the main body.

This modular construction makes the product easier to inspect, clean, dry, and reassemble.

Before use, always make sure all threaded connections are fully tightened.

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Choose Your Size

Small — 30mm

A slimmer and lighter option for customers who prefer a more compact profile.

Total Length: 103mm / 4.06in
Plug Body Length: 65mm / 2.56in
Maximum Diameter: 30mm / 1.18in
Key Compartment Opening: Approx. 23mm / 0.91in
Weight: Approx. 152g

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Large — 40mm

A fuller and heavier version with more internal storage space and a more substantial metal feel.

Total Length: 103mm / 4.06in
Plug Body Length: 66mm / 2.6in
Maximum Diameter: 40mm / 1.57in
Key Compartment Opening: Approx. 34mm / 1.34in
Weight: Approx. 195g

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Product Specifications

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Why You'll Love It

🔑 Hidden Key Box

Store a compatible small key directly inside the plug.

🔒 Designed for Keyholding

An interesting accessory for chastity keyholding and lock-and-key play.

🍑 Functional Butt Plug Design

Smooth tapered construction combined with a wide flared base.

✨ Stainless Steel

Smooth, durable, weighty, and easy to maintain.

🔄 Twist-Open Storage

Unscrew the top section whenever you need to access the hidden compartment.

🧩 Detachable Structure

Multiple sections can be separated for easier cleaning and maintenance.

📏 Two Sizes

Choose between a compact 30mm version and a fuller 40mm version.

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How to Use the Hidden Key Box

Step 1 — Open
Turn the polished upper cap counterclockwise to open the hidden compartment.

Step 2 — Insert the Key
Place your compatible small key inside the storage space.

Step 3 — Close
Screw the top cap securely back into position.

Step 4 — Check
Make sure the cap and base are completely tightened before use.

Your key is now hidden inside.

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Key Compatibility

This product is designed for small and compact keys.

Because chastity cage keys, padlock keys, and other lock keys vary in shape and size, please compare your key dimensions with the available storage opening before purchasing.

For larger or unusually shaped keys, we recommend choosing the 40mm version for additional storage space.

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Care & Cleaning

Clean the product before and after every use.

Use warm water with mild soap or an appropriate toy cleaner. Thoroughly rinse and dry all parts before reassembly.

For the hidden storage compartment:

• Remove the key before cleaning.
• Clean the inside of the compartment separately.
• Make sure the compartment is completely dry before storing a key inside.
• Check threaded connections regularly.
• Do not use the product if any part becomes damaged or loose.

Use a suitable lubricant when necessary.

For adult use only.

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FAQ

What is the Stainless Steel Hidden Key Box Butt Plug?

It is a 2-in-1 stainless steel butt plug and hidden key storage box. The upper section unscrews to reveal a concealed compartment designed to hold a compatible small key.

Can I store a chastity cage key inside?

Yes. The hidden compartment is designed for compatible compact keys, including many chastity cage keys. Because key sizes vary, please check your key dimensions before ordering.

Is the key visible after the cap is closed?

No. Once the upper cap is screwed back into place, the key is concealed completely inside the stainless steel body.

What's the difference between the 30mm and 40mm versions?

The 30mm model is slimmer and weighs approximately 152g, while the 40mm version provides a fuller profile, larger storage opening, and weighs approximately 195g.

Which size has more key storage space?

The 40mm version has the larger compartment opening at approximately 34mm, compared with approximately 23mm on the 30mm model.

Can the product be taken apart?

Yes. The upper cap and lower base use a detachable threaded design, making the product easier to access and clean.

Is this just a key box?

No. It functions as both a hidden key box and a stainless steel butt plug, which is the core concept of the product.

What other names are used for this type of product?

Customers may also search for it as a key holder butt plug, hidden key butt plug, chastity key holder plug, key storage butt plug, secret key box plug, stainless steel keyholding plug, or wearable key holder.