Rigorous Makes Perfect. MR.GREEN the professional beauty tools manufacturer Origin from Germany. MR.GREEN means high quality & reliable and the Industry leading position. This is a double sided foot file made of surgical grade stainless steel . The rough side can remove thicker calluses and cracked heels,the other fine side can remove dry dead skin and soft calluses. The foot callus remover adopts advanced integrated molding technology which make it no burrs and more safely. It can help you solve most of your foot skin problems which gives soft and beautiful feet with little effort.