This property defines the Unicodes which belongs to Counting Rod block
Characters like 𝍠,𝍡,𝍢, etc. are listed under Counting Rod Block.
26 Characters are present in Counting Rod Block starting with the Unicode point U+1D360 that represents the character 𝍠.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.