Scissors

A Pair of Scissors are the crafting tool used for Tailoring at a Loom.

Legacy Scissors
Note that the item is called "A Pair of Scissors" and not "Scissors"

If you attempt to use a loom with Scissors in your backpack and get the error "The tool for this workbench could not be found in your backpack or craft bag", this means the scissors you have are legacy scissors and must be replaced with new ones before you can use the loom to tailor.