The 40 gauge star needle has 4 working edges, so making it slightly faster to work with. With only 2 barbes per needle it is a finer alternative to the 38 gauge and can be an advantage when working with finer fibres. This needle makes a smaller hole and felts the fibres faster. This needle is great for finer detail like eyes and finishing touches.
NOTE: My needles do not come color coded. If you want them color coded, please let me know.