Baren's ultra-fine etching precision processing technique perfectly removes both thick & light calluses without failure. It can be safely used even on dry feet due to the ultra-fine etching precision processing technique. Made of rust-resistant stainless steel & ABS rubber material which is strong against water it is not slippery & can be used safely & cleanly. It is an effective & failure-free foot keratin remover that exfoliates very well. Recommended for those who have not been able to see the effect of existing exfoliators which made it difficult to remove keratin needed too much force due to uncomfortable handles whose process of soaking in water was too troublesome & bleeding with continued use. This product is recommended because you can’t just use any exfoliator: glass is difficult to hold & breaks when dropped stone has an uneven surface that can damage the skin & the planer method can cut the skin if used incorrectly.