A short video showing my home made slide hammer. This can be used for pulling out concrete nails or nails in awkward or sensitive areas where a hammer would damage the area around the nail.

Vise Grips https://amzn.to/2kxtHZX

Parts used:

7/16" coarse threaded rod
7/16" coarse nuts (4 total)
large washers (8 total for mine)
hollow rod/pipe that can take a 7/16" tap
a heavy weight with a hole through the middle for the slide
various tools to build it