The knock-knock-in concrete examples should be provided throughout the whole of the border region and for cutting, knock carefully so that the damage due to bumps to a steel Prod.
A concrete example in a jab It should prod all over the area across the section. And for the edges of the jab with caution to avoid damage due to impact with a steel battering ram.
The two concrete examples in the model. Should knock over the whole face cut. And for the edge of a jab with caution to prevent a damage due to impact with iron ram.