The first one has patina the others not so much and look fresh. If you have ever skinned/cleaned a hide off an animal that first tool would be ideal.
These were all found on the same site within 20 ft of each other. 3 came from same spot around old oak tree about 4-6 inches in soil. I’ve found a couple points and loads of broken blades in this same hole.Those are interesting. Are you finding them all by themselves or is there other stuff associated with them?