Keychain knife with finger hold and magnets

This is a quick remix of k-eye's excellent keychain knife.

When I grip utility knife, I tend to put my index finger behind the ridge of the blade to help pushing the blade into the thing I am cutting. The original design is not easy to grip this way, so I made some change to support this grip style.

I also added a hole for 6x2mm magnet - with my pla print, the 6x2 magnet is able to keep the knife sticking nicely on metal surface. 

Now I have so much more knife.. I should be able to find one when I need it now.. 

Added some grip support so I can grip the blade more firm for detailed work

Added a magnet hole to insert 6x2mm magnet