Square knitting needles are designed to provide a more ergonomic grip, making them a great option for people with hand fatigue or arthritis. The flat sides can help maintain more consistent tension, especially for beginners, and some knitters find them easier to control than traditional round needles. They’re often praised for reducing strain during long knitting sessions, though the feel may take a bit of getting used to. While they don't change the outcome of the fabric itself, they can make the knitting process more comfortable and steady for many users.