Self-Defense Brass Knuckles

3D Printed Compact Knuckle-Style Grip

This is a compact knuckle-style grip design made for 3D printing enthusiasts who enjoy unique accessories and novelty props. The model is designed to print easily while maintaining good strength and comfort in the hand.

Features

• Ergonomic finger holes for a comfortable grip
• Smooth curved edges for better print quality
• Compact size – easy to carry or attach to a keychain
• Optimized for FDM printing

Recommended Print Settings

• Layer height: 0.2 mm
• Walls: 3–5 perimeters for strength
• Infill: 30–60%
• Material: PLA, PETG, or ABS
• Print orientation: Flat on the bed for best strength

Notes

• Increase wall count instead of just infill — walls add much more strength.
• PETG or ABS is recommended for better durability compared to PLA.
• This model prints without supports.

Safety Disclaimer

This model is provided for educational and personal-use purposes only. Laws regarding self-defense tools vary by country, state, and municipality. It is the responsibility of the user to verify local laws and regulations before printing, carrying, or using this item.

Improper use may result in injury. The designer assumes no liability for misuse, modification, or illegal use of this model. Use responsibly.

If you print one, feel free to share your make. Feedback is always appreciated!