When it comes to replacing a broken key, it's important to take into account the condition of the key and the process for copying it. A professional locksmith can measure the cuts on the key and cut it according to the code. Generally, it is possible to copy a broken key, but there are some exceptions. It's best to remove a broken key from the lock before attempting to copy it, as this will make the process simpler.
Car keys can be copied regardless of how complex they appear, as long as you have the key code associated with the vehicle's VIN. House keys are usually the easiest to replace, as common raw house keys are relatively inexpensive and locksmiths can decode patented keys with standard or site key decoders. To make a copy of a broken car key, there are many aspects of the key that need to be copied and other services may also be required. To replace the broken key, the locksmith can join the parts together and make a new key or engrave the key code on the new key to make it work.
At hardware stores, you can select a raw replacement part that matches the thickness of the original wrench. However, often these keys (especially patented ones) come with cards with codes that make duplicating a broken key much faster. Other issues related to copying broken keys with transponder chips have to do with needing functional keys to program new keys.