A common misconception is that locksticks are made by hand, by a machine.
In fact, they are made using a machine called a lockstitcher.
These machines use a series of small holes to make a large circular pattern, which is then cut to fit a door.
The process involves grinding the pattern onto the door surface.
This process has the added advantage of reducing friction and noise, which may be beneficial in the construction industry.
To learn more, see the video below, which introduces the lockstitchers in the context of the production of lock-free door panels.