Wrists hold the key to the action
There’s nothing too much out of the ordinary at the set-up. As you can see, I have the ball fairly well back in my stance, the majority of my my weight is supported on the front foot, and my hands lean in towards the front leg, leaning the shaft towards the target. I have created the conditions for what is, esentially, a hands-and-arms swing, the early and full wrist hinge being the most noticeable feature of the sequence.

Create a steep angle of attack
In order to have the leading edge of the club strike down into the sand at the exact chosen entry point, it’s essential that you generate a fairly steep angle of attack with a very lively and involved wrist action. In the backswing, this gets the clubhead working up quickly up above the hands. Note that the upper body itself has not really been involved at all in making the backswing – in other words, there is no rotation of the trunk. This is all about you using the wrists to generate the upward (and much of the downward) momentum.