These Tefillin Dakkot are made by stretching a thin layer of parchment over a structural base whereby the outer parchment forms the entire box of the Tefillin- considered Halachically preferable. The 33mm batim are of higher quality, more durable and larger than those of Tefillin Peshutim Mehudarim.
Tefillin Dakkot are considered to be finished in a superior manner to Tefillin Dakkot Ohr-Echad. The boxes of Tefillin Dakkot Ohr-Echad are covered with an additional layer of parchment and Tefillin Dakot Ohr-Echad are considered to be Halchically superior to Tefillin Dakkot.
The Tefillin are Kosher, made in Israel by "Pe'er HaSTaM", proofread by an expert and a computer. The Tefillin come with a certificate from Mishmereth HaSTaM that confirm that the Tefillin were proofread by a computer, as well as a certificate confirming the Kashruth of the Tefillin. The Tefillin also come with a ten year warranty.
Important to know:
If you are right-handed you wear the Tefillin on the left arm whereas if you are left-handed you wear the Tefillin on the right arm.