I understand that the exact use of Tyrannosaur Rex's claw is a mystery, or at least debated. I also understand that claws can be used for a variety of different purposes, selective pressure adapts their morphological to be better optimized for certain tasks. Some are used for hunting and killing, like large cats' claws, some are used for digging, like bear's claws, while others are used for climbing, like squirrel's claws.
My question is, all other clues and bits of information about if and how T. Rex might have used its arms, what 'type' of claws did it possess? I'm not asking, in this question, about its arm, the arm's musculature, its mouth or jaw, or about any of the rest of the animal. Based on the morphology of the claw alone, and comparing it to known uses of similarly shaped claws, what types of tasks were the claws geared towards?