A blade is there to make straight cuts. The second blade is flexible, you can also cut curves with it. The third blade has a wave shape.
So that you don't get injured, two red rubber buffers are included. With these buffers, you can put pressure on the blades without harming yourself.
Blades are not toys. The blades are only suitable for adults. Blades are very sharp and must be unpacked and used with great care. Caution, risk of injury.