Homemade Padlock With Screw Key

Check out my Instructable here:

http://www.instructables.com/id/Padlock-With-Screw-Key/

This is a example of a screw type lock that as far as I could tell has been around since the 18th century and I came across some examples of this type of lock on eBay that were made in the 20th century. Lots of 19th century prison shackles use this design.

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