The sumo pin pull is not often used, but I have seen it done before. The main difference, obviously, is the stance. Most of the time, the pin pull is done with a conventional stance.
This exercise is usually done for max effort work. You can do it from several different levels, but recommend working at your weakest point (or just below).
To do this exercise, make sure your head and chest are up. Also, be sure that your shoulders are slightly behind the bar. Remember that the position you are going to be in is going to different than the starting position of the sumo deadlift.
