This model is a 3D printed insert designed to replace the inner part of a Sharpie pen, transforming it into a self-defense tool. Once assembled, the insert provides additional strength and durability to the pen body, offering a compact tool you can keep in your pocket or bag.

Important Disclaimer
This model is provided strictly for personal and educational purposes only. The creator does not encourage misuse, illegal activity, or harm of any kind. By downloading, printing, or assembling this file, you agree that any use or misuse of the design is solely your responsibility. The creator assumes no liability for accidents, injuries, or consequences resulting from its use.
Always check and comply with your local and state laws regarding carrying self-defense tools.

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This 3D model is protected under a proprietary license. By downloading or purchasing this file, you agree to the following terms:

You are granted a non-exclusive, personal, and non-transferable license to use this file for personal 3D printing only.

You may not copy, modify, distribute, sell, or share this model or any derivative works in any form.

Unauthorized redistribution or commercial use is strictly prohibited and may result in legal action.

For commercial use, licensing, or collaboration inquiries, please contact me directly.

Thank you for respecting my work and supporting independent creators!

Print Settings

Machine type: FDM printer

Material: PLA (PETG or ABS recommended for durability)

Layer height: 0.2 mm

Infill: 15%

Supports: Required

Print time: ~30 minutes

Post process: None

Assembly & Finishing Instructions

Disassemble a Sharpie pen and remove the original ink core.

Insert the printed self-defense core into the body.

Apply a generous amount of super glue (or similar strong adhesive) inside the pen before inserting the part.

Add a few drops of glue on the tip once the lid is on, to reinforce its strength.

Let dry fully before handling.

Safety Notes

This model is not a toy.

Use extreme caution. The insert can cause injury if mishandled.

Not suitable for children or minors under any circumstances.

Never use in aggressive or unlawful situations — this design is intended only for self-defense purposes.

Make sure carrying or possessing this tool complies with your state or local laws.

The creator assumes no responsibility for misuse or harm caused by this item.

Handle, store, and carry responsibly.