[Regarding] one who makes utensils from iron ore, or from a metal ingot, or from the hoop of a wheel, or from sheet metal, or from plating, from the bases of utensils, or from the rims of utensils, from the handles of utensils, from scraps, or from filings, [the utensils are] tahor. R’ Yochanan ben Nuri says: Even [utensils made] from cut pieces. [But utensils made] from pieces of broken utensils, [or] from fragments, or from nails that were known to have been made from [other] utensils, are tamei. [If one made utensils] from nails, Beis Shammai rule [them] tamei, but Beis Hillel rule [them] tahor.