A locksmith puller pulls the hardware out of a locked doorknob, which is a bored cylindrical lock. The tool does not destroy the lock but allows you to reach the lock body.
A homemade locksmith puller uses a threaded bolt, a cradle made from a coupler, a wing nut, PVC pipe, washers, and a jamming key. The coupler has a small bolt hole drilled through it perpendicularly. You place the key in the coupler and secure it with a small screw through the bolt hole. The coupler threads onto the threaded bolt. The washers and wing nut fit on the opposite end of the threaded bolt.
You insert the jamming key into the doorknob. Because the key does not fit the profile of the doorknob, it jams. The PVC pipe secures around the perimeter of the doorknob, creating leverage as you turn the wing nut on the puller. This action twists the hardware in the doorknob, pulling it out.
Because a homemade locksmith puller jams the lock, the key may be difficult to get out. The puller does not work on a mortise lock, since those locks do not have knobs.
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