Neutral Yer should not be confused with Hard sign.
Neutral Yer is a letter of the Cyrillic script.
In transcriptions of Church Slavonic, it is used to indicate Ь or Ъ when it is not possible to tell the difference in a historic manuscript.[1]
It has the appearance of a yer, but with a hook at the top of the stem. In some fonts it appears identical to Ъ.