What is the minimum size of [broken] metal vessels [for them to be susceptible to impurity]? A bucket must be of such a size as to draw water with it. A kettle must be such as water can be heated in it. A boiler, such as can hold selas. A cauldron, such as can hold jugs. Jugs, such as can hold perutahs. Wine-measures, such as can measure wine; and oil-measures, such as can measure oil. Rabbi Eliezer says: the size for all these is such as can hold perutahs. Rabbi Akiva says: a vessel that lacks trimming is susceptible to impurity, but one that lacks polishing is clean.

A staff to the end of which he attached a nail like an axe is susceptible to impurity. If the staff was studded with nails it is susceptible to impurity. Rabbi Shimon ruled: only if he put in three rows. In all cases where he put them in as ornamentation the staff is clean. If he attached a tube to its end, and so also in the case of a door, it is clean. If it was once an independent vessel and then it was fixed to the staff, it remains susceptible to impurity. When does it become pure? Bet Shammai says: when it is damaged; And Bet Hillel says: when it is joined on.

A builder's staff and a carpenter's axes are susceptible to impurity. Tent-pegs and surveyors’ pegs are susceptible to impurity. A surveyor's chain is susceptible to impurity, but one used for wood is clean. The chain of a big bucket [is susceptible to impurity to a length of] four handbreadths, and that of a small one [to a length of] ten handbreadths. A blacksmith's jack is susceptible to impurity. A saw whose teeth were made in a hole susceptible to impurity, but if they were turned from below upwards it is clean. All covers are clean except that of a boiler.

The parts of a wagon that are susceptible to impurity: the metal yoke, the cross-bar, the side-pieces that hold the straps, the iron bar under the necks of the cattle, the pole-pin, the metal girth, the trays, the clapper, the hook, and any nail that holds any of its parts together.

The clean parts of a wagon are the following: the yoke that is only plated [with metal], side-pieces made for ornamentation, tubes that give out a noise, the lead at the side of the necks of the cattle, the rim of the wheel, the plates and mountings, and all other nails, all of these are clean. Metal shoes of cattle are susceptible to impurity but those made of cork are clean. When does a sword become susceptible to impurity? When it has been polished. And a knife? When it has been sharpened.

A metal basket-cover which was turned into a mirror: Rabbi Judah rules that it is clean. And the sages rule that it is susceptible to impurity. A broken mirror, if it does not reflect the greater part of the face, is clean.

A knee-shaped key that was broken off at the knee is clean. Rabbi Judah says that it is unclean because one can open with it from within. A gamma-shaped key that was broken off at its shorter arm is clean. If it retained the teeth and the gaps it remains unclean. If the teeth were missing it is still unclean on account of the gaps; if the gaps were blocked up it is unclean on account of the teeth. If the teeth were missing and the gaps were blocked up, or if they were merged into one another, it is clean. If in a mustard-strainer three holes in its bottom were merged into one another the strainer is clean. A metal mill-funnel is unclean.