I had my nail clippers removed on a flight back from Cuba...had forgotten about them in my makeup bag....I have one of those necklace thread yarn cutters...you could get one of those...crochet hooks are ok...my sister was crocheting on the flight but she brought a plastic one...not metal...and there is a website I found that stipulates all the banned stuff and the restrictions...but I have to say I can't remember...I just googled it....