Keys are not made of materials as resistant as cylinders or locks. With the passage of time and continued use, the metal wears out. The most common causes are:
- Wear of the metal due to daily use.
- Trying to force the key when opening.
- Manufacturing defects in the key duplicate.
- Old or poorly lubricated locks that cause jams.
When this happens, it is most advisable not to try to remove the key on your own. Using household items can worsen the situation, damage the cylinder and force you to change the cylinder or even the complete lock — much more expensive than a professional extraction.