The KAI 7230 9" Professional Shear is ideal for thicker, more difficult fabrics.
The 7000 Professional Series is made of 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 the ability to cut thicker fabrics and allow for easier use.
The 7230 9" is considered a lighter shear, yet long enough for standard sewing projects.