Made of a high carbon, hardened stainless steel, the Kai 7230 is the 9-inch professional scissor that is ideal for thicker, more difficult fabrics. The addition of Carbon allows fora steeper cutting angle, giving the scissor a sharper, finer edge that last. The Kai 7230being a 9-inch, is considered a lighter scissor, yet long enough for standard sewing projects. Most people compare this scissor to the Kai 7250 10-inch scissor. When compared, the Kai 7230 is better suited to people with smaller hands or desire lighter weight.