I would say different types of the same thing would count separately, so clothes pins may count as one or many, depending on their type, as would clamps - there are so many different ones so you might need to elaborate so we can make our minds up As for lengths of rope, yes definitely count as separate

I dug all my toys out of their various boxes not so long ago and rehoused them in their new boxes, threw out the ones that were really past their best and found I was left with about 30-40 items. Some used often, some rarely. Some used when I'm alone, some with my husband. No idea how many I've gone through over the last 25 years or so!