The grip of the controller.
The grip and the pointer of a controller are usually angled differently. The grip is the main part of the controller that the player grips with their hand. The main use case for this part of the controller is holding an object in the user's hand, such sa a sword or gun. If you wanted to pick something in the scene from a controller pose, this is most likely the ray you would want to ray-cast with, assuming you're rendering something other than the controller model.
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