When playing basketball three-step layup, the defense first hit the ball and then hit the hand is considered a foul or not a foul depends on whether the shooting action of the layup is completed, if the layup action has been completed, the defense hit the hand is not a foul; if it is not completed, then hit the hand is considered a foul and the free throws are made twice.

The hand foul mainly refers to the basketball players in the dribble or layup, shooting when the defense hit the hand, so the referee will blow his hand foul. According to the FIBA 2004 Basketball Rules, the official name is "Illegal Use of Hands".