Kai Scissors are made of heavy-duty, high-carbon stainless steel which allows these sewing shears to be sharpened at a steeper angle, and also allows them to maintain their cut-life and durability over time. If your looking for high quality professional scissors that are great for sewing projects on cottons, denims, silks, fleece, and even Carbon fiber, Kevlar®, and Nomex® then Kai is the brand for you.