Goal: Install a neutral-to-strong grip that squares the face
How to do it
In front of a mirror, take your grip and check that you can see 2-3 knuckles of the lead hand. Rebuild the grip from scratch, closing your eyes at the end to memorize the feel. Finish with 50% swings, checking the grip before each one.
On face-on video, fewer than two knuckles of the lead hand are visible at address; the thumb-index V points at the chin or the lead shoulder.
Frequently asked questions
What is the "The knuckle mirror" drill for?
Install a neutral-to-strong grip that squares the face
How do you do the "The knuckle mirror" drill?
In front of a mirror, take your grip and check that you can see 2-3 knuckles of the lead hand. Rebuild the grip from scratch, closing your eyes at the end to memorize the feel. Finish with 50% swings, checking the grip before each one.
How long does the "The knuckle mirror" drill take?
About 10 minutes per session, 15 reps.
Sources
Ben Hogan — Five Lessons: The Modern Fundamentals of Golf