Points
There are four main point styles. In theory, every grind may be
associated with every style, although the oblique point is most
often seen in straight grind razors.
The spike is for exact work in small area's. However, there is an increased risk of pinching the skin with the spike, and the other point styles suffice. Further, the choice of point style is a just a matter of esthetics and not of purpose.
The shape of the back is nowadays relatively constant and less
relevant for the function of the razor. However, the back serves as
a guide to keep a constant angle during honing and stropping.
Therefore, the surface of the back must be polished and rounded
where it gets into contact with the sharpening medium.There are
four main point styles. In theory, every grind may be associated
with every style, although the oblique point is most often seen in
straight grind razors.