If you’ve ever needed a spare key for your home or car, you know how convenient it can be to have one on hand. While you can always go to a locksmith or hardware store to have a key copied, did you know that you can also do it yourself at home? Here’s a breakdown of how to copy a key at home.
First, you’ll need to purchase a key copying kit. These kits can be found at most hardware stores and include everything you need to make a copy of your key, including a key clamp, blank keys, and a file.
Next, place the original key into the key clamp and tighten it securely. Place a blank key into the other side of the clamp, making sure that it’s aligned with the original key.
Use the file included in the kit to file down the blank key until it matches the shape and depth of the original key. Be sure to file slowly and carefully, checking your progress often to avoid over-filing.
Once the blank key matches the original key, remove it from the clamp and test it to make sure it works properly. If it doesn’t work, you may need to file it down further until it does.
Repeat the process with any additional keys you need to copy.
Copying a key at home can be a cost-effective and convenient way to ensure that you always have a spare on hand. With a key copying kit and some patience, you can easily make copies of your keys without having to leave your home.

Ryan Hatch is a master locksmith with 15 years of experience in residential and commercial security. When not writing, he enjoys hiking and tinkering with vintage locks.