Strong Fist is Guy's and Lee's characteristic fighting style, the purpose of which is to cause external damage and break bones. It is the exact opposite of Gentle Fist which is used mainly by the Hyūga clan. This style of fighting involves smashing your opponent and is generally used only by extremely physically powerful and dominating shinobi.

Users
Might Guy
Rock Lee
Sasuke Uchiha
Kakashi Hatake

Classification
Taijutsu, Fighting Style

Class
Offensive

Range
Short-range