Question

How can we take a iron nail without our hands

Answer 1

With magnets you can take iron nails

Answer 2

Answer:

Not having enough vitamin B-12 can cause nails to turn dark, thin and possibly spoon shaped. ... Dark spots or streaks rather than full discoloration of the nails may be caused by bruising, psoriasis, melanoma (a type of skin cancer), chronic infections, and medications such as from cancer chemotherapy.