Printable Snap-Lock Keyring — Strong & Lightweight by HamAndChris
Why I Like It
This is a solid, well-thought-out design. The barbed snap-lock closure is clever — easy to engage with one hand, but once it’s locked, it takes real intention to open. No accidental releases, no fumbling. I’ve had cheap split-rings fail me at the worst times. This doesn’t. Printed in PETG, the small size comfortably holds around 10 lbs — more than enough for a full keychain. The tolerances are tight, the fit is clean, and the print time is short. Worth every minute of it.
If you have a printer and haven’t tried this one yet, it should be next in the queue.
What Filament Should You Use?
The designer recommends PETG for this print — and it’s a solid choice for most EDC applications. Here’s a quick breakdown of the three most common filaments for EDC gear so you can pick the right one for your setup:
| Filament | Hardness | UV Resistance | Durability | Best For |
|---|---|---|---|---|
| PETG | Medium | Fair | High | Everyday indoor/EDC carry, food-safe prints, flexible-tough balance |
| ABS | High | Poor | High | Rigid structural parts, heat-resistant applications (e.g. car/glove box gear) |
| ASA | High | Excellent ☀️ | Very High | Outdoor EDC, belt/bag attachments, anything exposed to sun or weather |
TL;DR: Use PETG for most EDC prints — it’s easy to work with and tough enough. Use ASA if the piece will live outdoors or in direct sunlight. Use ABS if you need maximum rigidity and heat resistance and have an enclosure on your printer.
