Scholl 2 in 1 corn express pen the scholl 2 in 1 corn express pen is a fast and effective way to treat corns thanks to its scraper and advanced treatment liquid all in one handy pen gently remove the surface layer of the corn with the scraper to apply a thin layer of the liquid treatment to the effected area to soften and relieve pain associated with corns 2 in 1 corn express pen fast acting reusable can be used on multiple corns suitable for hard corns on toes and balls