Split-Key Ring Opener

I hope this little object can be useful to you too.

 I had to insert objects into a hundred spiral rings, 

I tried to open them with my nails, after about ten I had no more nails,

I tried with a screwdriver, but most of the time it fell, it was absolutely not practical, so I made this, simple, immediate but above all functional object.

No printing advice, they are not needed, the object is so simple.

30/07/2025:   As requested, I added a template with a larger fingertip area. I hope it's equally useful.

Happy printing to everyone