Why is the club face of some woods closed

Take your driver or three – wood and put it down on the on a line or on a shaft or on a alignment stick (as shown in the photo graph) according to what you think is a ‘square’ club face position. In this position, the club face should aim at the target and should be perpendicular to the shaft or alignment stick but you will notice with most woods that the club face is a little shut and aims left of the target. This is because most manufacturers design their woods with the club face a little shut or closed to the shaft. Let’s look at why this is so and how it helps you.
The majority of club golfers slice their shots and more so with the longer irons and woods. The golfer slices the ball because, due to a number of swing errors, they deliver the clubface to impact with the ball with the face open to the intended target. This causes the ball to leave the face with a slicing sidespin action.
By changing to a wood head with a more closed face angle (in which the face points to the hook side of the target when you set the wood flat on its sole), the number of degrees that the golfer delivers the face open to impact with the ball is reduced. Less open face at impact = less slice sidespin on the ball, which results in straighter as well as longer shots.