Lampshades and pendant lamps.
Decorate candle holders.
Holder for jewelry.
Original tie backs for curtains.
Keys can decorate sofa cushions.
Ordinary bottles will look much more original, if you tie beautiful keys to their neck.
The keys can be used not only in their original look, but they can be painted and decorated with beads or rhinestones, as well.
From the keys you can make these interesting bracelets.
There are ideas for wedding fashion, as well.