For critical calluses and severely cracked heels. Let’s talk about convenience! Finally there is no need for time consuming messy feet soaking! Checi nickel foot files are specially designed to work on dry skin enabling you to have beautiful feet at all times! Light-weight Checi nickel files can be taken everywhere. They will not come apart and will last and last! It’s State-of-the-art nickel abrasive surface safely an gently smoothes away hard rough skin and calluses for an unsurpassable smooth pedicure. It’ll not take away healthy skin making calluses grow back slower and softer overtime. It’s easy to grip handle and thin curved head lets you file even hard-to-reach areas. CH-404 is a coarse grade file for critical calluses and severely cracked heels. For even better results finish your pedicure with CH-702.