I wanted a bigger chain pull for my lamp.

I made this with a push in clip that locks it to the chain.  Note: It's pretty much a one-time-use thing, so make sure you test fit it lightly before putting it together.  May require a bit of light sanding to get everything to fit.  Make sure NOT to use a Brim or any supports. 

Do use the highest quality settings your printer will handle  For mine that was .12mm layers.

It only takes about ten minutes to print.

Note, This works only with 3mm pull chains.

To assemble. Push the chain down through the top hole until it is almost coming out of the bottom.  Then slide the lock in place and push until it bottoms out.  Use some force to get it in there, I pushed on it with the edge of a pair of pliers.

That's it.

Enjoy!

EDIT:  Added a version with a support for the chain clip. See pics with the galaxy black part.