Here are the steps to install a deadbolt lock on your door:
1. Take help from the manufacturer’s template. Most deadbolt manufacturers supply their product with a reference template.
2. Drill a hole for the deadbolt. Drill a hole on the reference points you marked from the template.
3. Drill a hole through the edge of the door.
4. Recess the area around the faceplate.
5. Install the bolt on the door.
6. Install the strike plate on the door jamb.
7. Test your new deadbolt lock.
For more detailed instructions, you can check out this [step-by-step guide](https://www.thisoldhouse.com/doors/21016948/how-to-install-a-dead-bolt-lock) from This Old House or this [guide](https://www.wcmanet.org/how-to-install-a-deadbolt-on-a-metal-door/) from WCMA Window & Door.
