If installed in a "U" Shape at the top of your main door, it safeguards from black magic and all negative influences. It is said to bring in prosperity and happiness if installed in an inverted style. Households, where Horse shoe is wrapped in a black cloth and placed in granary, never faces shortage of grains and food forever. Horse shoe should preferably be installed on a Saturday.
Naav Ki Keel is an old nail taken out of a boat. It helps nullify malefic effects of planet Saturn and pacifies the same to bring in happiness, good health and prosperity.