The route starts low under the steep arete to the right of Corkscrew. Using arete holds and crimps on the roof, squeeze and hook your way through the steep arete and up the short, vertical arete to the finishing break of Corkscrew. (One book calls it V6, but I think that is the stand start one move wonder on the vertical section of the arete.)
This is just right of Corkscrew on the steep arete.
2 pads (one if you don't mind a little sand).