Over 200+ safety micro blade technology to gently shave away dry skin and leave your feet feeling smooth and soft Simple and easy to use for feet. Leaves calloused feet feeling smoother and softer. Each stainless steel file contains 240 safety micro blades to gently shave away rough skin from your feet. Benefits The protection cover doubles as a convenient catcher leaving you with no-mess. Slimline design is perfect to use around hard to reach areas. Do not use on broken or infected skin. Discontinue use if irritation occurs.