Examining tefillin for kashrus, to make sure tefillin meet Torah Law, is a service Breslov prides itself in. The mitzvah of tefillin, and the prayers said with it, can be nullified if the tefillin straps, boxes and parchment within are worn from use, damaged or broken. Breslov owner Rabbi William Goldberg is highly skilled in examining and repairing head and arm tefillin boxes and straps.