Someone put the nail right through the Mezuzah, they are very lucky it did not go through the letters. A good Mezuzah cover has the holes for the nails outside of the Mezuzah compartment.
Hole In Mezuzah
Hole In Tefillin Parshios
Every letter needs to be surrounded by Klaf. Should the hole be along the letter it would make it not Kosher.
As you can see here the Mem has a hole inside. but the hole is not touching the letter itself therefore it is still kosher.
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There are Many things that can render Tefillin or Mezuzah not Kosher or at best minimally Kosher.
Some of which happen over time with aging and some unfortunately are Posul from the get go.
Letters, words and or Tagim that are missing, extra substituted, touching, Broken, Improperly Spaced, misshapen faded, cracked and weather damaged.
We document the problems we find and periodically upload them to the website.
We hope that this will educate and encourage the public to purchase only Tefillin and Mezuzas that are high quality from a reputable source, to take care of them properly and have them checked regularly.
Rabbi Kass was ordained by Rabbi Yisrael Meir Lau, former Ashkenazik Chief Rabbi of Israel. He is certified as a Sofer for both Kesivah and Hagoah by one of the leading experts in Safrus, Rabbi Avrohom Tzvi Vosner, Rav of the Vad Mishmeres Sta”m.