Carry On Bags: Yes
Checked Bags: Yes
In general, you may place your knitting needles and needlepoint tools in carry-on or checked baggage.
Circular thread cutters or any other cutter or needlepoint tools that contain blades must be placed in checked baggage. You are permitted to keep scissors smaller than 4 inches in your carry-on baggage.
The final decision rests with the TSA officer on whether an item is allowed through the checkpoint.