Mirror feature and mirror body both plays a major role. But the working process of every tool is slightly different.
Instance feature has two different variations one will be rectangular array and other will be circular array.
Break corner and chamfer tools are used to make some changes over sheet metal body. Both the tools provides a different activity in creation of the parts.
Closed corner and Three bend corner are used in different aspects. Here one is used for the two flange corner and other is used for three flange corner.
Bend and jog both the tools are used for the modification of model by one side of material.
Calculate the radius of circle is the distance from center of the circle to circumference of a circle. Circumference is the outside of a circle perimeter.