Benefits: Material: Stainless steel, ABS Remove callus easily for soft and smooth skin. 234 super micro circular steel safety blades removes dead skin cells and records on the safety coverage on the back, while not being scattered on the floor. How you can use: one. Place the cutter side on the applicable area and rub gently to remove dead skin cells. two. Right after using, opened the cover to take out the collected dead skin cells and wash off the blade and coverage for running water.