Mechanical jigsaw from an aircraft model engine

It is more convenient, productive and safer to use a sharp knife, which can only be achieved by sharpening correctly performed. When working with a blunt tool, you have to apply a lot more effort than is required for the work to be done with a well-sharpened cutting tool. If during a tense, and therefore not too controlled, manipulation of a blunt knife, he breaks off the cut material and lands on the fingers, then it turns out to be sharp enough to cause a painful and sometimes severe injury. Read More