pre-forms or blanks?

[larson1951]

I have many pieces similar to these
one time I found 22 of these kind of pieces in a small area
here are some I found last night while going through a container of junk

I think they are unfinished pieces or blanks, or pre-forms

what is your opinion
I am showing front and back views

 

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[Keokukjeff]

The top 3 pieces starting from left..............are big Blanks ready for biface reduction into preforms
The last 2 top row were probably reject/throw away preforms cause they would not knap right<some Cultures would use the throw away pieces for Scraper or Knife and some Cultures did not need too because of plenty of material>
The 2nd row looks like flake and preform rejects
Your 3rd row is Scrapers made from the reject preforms.....................
Thats what I see.............................
For the most part those are probably Arrowpoint Blanks and Preforms due to size...........