The KAI 7230 - 9" Professional Shear is ideal for thicker, more difficult fabrics.  The 7000 Professional Series, 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", is considered a lighter shear, yet long enough for standard sewing projects.