Build the grip with the club vertical and the elbows locked
Hold the club vertical instead of resting the clubhead on the ground, and lock both elbows straight so the hands support the club's weight. Form each pinch between the thumb and inside of the index finger, then flex the fingertips away from the palms to establish control against the handle.
Channel: stayhandsy
Watch official source at 6:20Why this context matters
This is part of the coaches' hand-to-handle grip framework; the cited words specify the setup and contact points without requiring the wider framework.