Maybe it's because their arm's look like they have claws on them (IDK what else it could be) so maybe the type of claw it has is a grip claw.
Its paws conceal sharp claws. If attacked, it suddenly extends the claws and startles its enemy.
That is the pokedex description in gold. They definately have claws, and if they were holding razor claws, they would already be weaviles, wouldn't they?
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