The Kai 7230 is the 9-inch professional scissor, ideal for thicker, more difficult fabrics. The 7000 series scissors, including the 7230, are made of a high carbon, hardened stainless steel. The addition of carbon allows for a steeper cutting angle, giving the scissor a sharper, finer edge. The carbon allows the finer edge to last longer. This gives the 7000 series a better ability to cut thicker fabrics and allow for easier use. The Kai 7230, being a 9-inch, is considerd 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.