Cool retracting claws.

NO TOOLS NEEDED.

Thanks to @Kanjoudakai on MakerWorld for the idea of adding an elastic band to improve the closing of the claw: 

If smaller size or better claw-closing is needed, check the profile named “different fingers”.

To assemble, look at the following image, inserting the pins to the corresponding holes and gluing the pin caps at the end. (Depending on the tolerance you will not need to use the pin caps.)

There is an option which does not even require any glue:

Mix and match any colors and filaments, no need to be any specific one.

This product is not affiliated with, endorsed by, or associated with Marvel Entertainment or its characters. 'Wolverine claws' is used solely as a descriptive term and not in reference to the Marvel character.