The 7000 series scissors, 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 it allows for easier use.
The 10-inch Kai 7250 is considered an ideal length for most sewing enthusiasts. Capable of cutting thicker fabrics with ease, the Kai 7250 meets almost all sewing project cutting needs
The Kai 7300 is the 12-inch professional scissor that is designed for use on thicker, more difficult fabrics or on multiple layers. It is also considered an ideal length for upholsterers and upholstery projects.