The inscription is not continuous. One is inscribed: bismillah a(l-rahman). The other is inscribed with part of sura xcvi, al-'Alaq, v.3.
The use for which these tiles were originally intended is unclear. The fact that two of the sides are decorated indicates that they were probably meant for a piece of mosque furniture rather than as wall revetments. The circular aperture is apparently unknown in other Kashan tiles and must have been created to accomodate part of the furniture structure.