Scholl 2 in 1 Corn Express Pen has a unique design: A scraper and an advanced treatment liquid in an all-in-one pen. The scraper is used to remove the surface layer of the corn and the advanced treatment liquid contains urea for deep softening action. Corns and calluses are caused by chronic pressure on the skin. The Scholl Corn Removal Pen is an effective way to treat corns and severe calluses, with visible results seen within the first week Containing a highly concentrated removal gel based on TCA-Active, the corn removal pen can treat multiple times without the need to scrape or file the corntitleDelivery & Returniddelivery-return