Keilim 12:4 - 12:5

מסמר הגרע (the nail of the bloodletter) – the cutting tool/surgeon’s knife of an artisan who lets blood flow (i.e., old-time, low-class doctors), and he is called a blood letter because he diminishes the blood. But there are those who interpret the nail of blacksmiths for they had a nail affixed on the block, when they remove a piece of iron from the fire and they want to cut from it, they place it on a nail and beat it with a mallet and it is reduced.

אבן השעות (sundial) – a rock/stone that has upon it lines and inscriptions upon them of the names of the hours, and nails are inserted I it and through them, they determine the hours.

מסמר הגרדים (weaver’s nail/pin) – a long nail that the weaver brings into a thin reed and attaches yarn on the reed.

ארון של גרוסות (ark of the grist dealer) – those who make pounded beans in their millstones, they have a kind of wooden ark/chest.

רבי צדוק מטמא – that ark/chest, for it has the law of a vessel upon it.

וחכמים מטהרין – for a wooden vessel is made for pleasure and is not made to be carried. But Rabbi Tzadok holds, sometimes, hey carry it to repair it. But the Halakha is not according to Rabbi Tzadok.

היתה עגלה – that the ark was placed upon it, of metal.

טמאה – for it is made for usage.

שהתקינו – that its head is curved or that he sharpened it in order that he would open and close it.

העשוי לשמירה – as a sign to see if a person enters there or not, for if they don’t find it like he placed it, it is known that a person came there.

עד שיצרפנו (until he smelted/forged it anew) – in fire for this purpose/need. And the Halakha is according to the Sages.

מסמר השלחני – a nail that is establish on a pillar that is in front of the moneychanger to set up the shutters of the store, and when they remove the shutters, the nail remains there. But the Rabbis declare it ritually pure because its use is with the ground. And the Halakha is according to the Sages (note: this is already taught in Tractate Eduyot, Chapter 3, Mishnah 8).