Here is the list of prohibited items. Check the day before your flight too, if the security level changes this list can too :wink: If they aren't on the list as prohibited, you should be able to put them in your carryon. I took my scissors out and put them in the open along with my liquids in the baggy :D
I took my 3 1/2" scissors, needles, no problem. I seen plastic knitting needles and crochet hooks on the flights too.
International flights may be different from domestic too.
http://www.tsa.gov/travelers/airtrav...ted-items.shtm