Why Garden Scissors Is Curved?

We often use altitude scissors, hedge shears, pruning shears and picking shears, we can find gardening tool designed mostly for arc and semi-elliptic, I believe everyone will have a doubt, garden tool manufacturer talk about the advantage this design for everyone.
The first advantage is prevent wrong trim, part of the professional pruning experts engaged in years of conservation work, a long time for pruning, it is easy to mistake the scissors with some shrubs, In order to prevent long-term trim caused by the "wrong trim", experts agree that pruning shears should be designed in an arc shape, but does not include hedge shears.

In addition, it helps to reduce friction, reduce friction between scissors and trees, flowering shrubs, for branches, or bushy branches plant, in order to better and more accurately trimmed various parts of the branches, such as parallel branches and crossing branches, most pruning tools designed for arc and semi-oval.