The first picture is shipwreck hull sheathing nails that were found in March and April.
The other pictures are of a fossilized shark tooth I eyeballed a few weeks ago. Not many people know this but they can be found on NJ beaches. Most times they are in great shape brought up by dredging projects. I believe it is from a sand tiger shark.
Just thought I would show other things that can be found here. Enjoy