Hard material is suitable for pencil, gel ink pen and ball point pen application. It is recommended to students & office suppliers.
Add on specific ingredients such as Quartz powder and this will allow eraser to have the polish functionality. Not only it can erase the light script of written by pen, but also erase the leakage of glue on scissor. It can polish the bottom of shoes as well,
Half grey polish quart eraser is applicable of PCBA.
Roughly material is similar to sand paper and dirt or dirty spots can be eliminated.
