How to do Zo in Song's hairstyle in the movie "Mean Street"? Do you have any requirements for your forehead?

Very common inch board, just look it up online.

"Inch board" is a very common hairstyle, also called "scrub brush". An inch is about an inch of hair, so it is called "inch board" because it is as short as a board. It is pushed by a pair of pliers (also called pliers) with a pair of pliers, which completely follows the head shape. The skull is round and full, and it looks better when pushed out.