Driving · Changes the swing

Driver face gate

Setup in 3D
3D view
Setup from above
From above

Two tees just wider than the driver head, either side of the ball. Swing through without touching them.

Trains
Driver contact, Heel, Toe
Dose (suggestion)
10 balls
Count
Shots through the gate, out of N
Stop signal
Stop: pain 3 out of 10 or more, pain spreading into an arm or leg, numbness, or more pain the next morning.
Source
Golf Digest: Hank Haney, test your impact