Home High Security and Challenge Locks (975) Daniel’s Undercut Challenge

(975) Daniel’s Undercut Challenge


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My vises are made by Panavise, a U.S. Company.  The one with the wide jaws is the model 350.  The smaller one is the model 301. Both have the 312 Base mount – www.panavise.com



  1. That lock is about my speed right now. At 70, I find my manual dexterity is falling behind my eyesight.

  2. How do you make al those intro's? So much intro's in such short time. Looks like its your profession making them.
    I love them all… 🤣 love your videos, keep up the good stuff for us. Love your channel

  3. On something like this, would also using sharp-edged spools for the key pins make the lock significantly more challenging? Would that come at the cost of smooth operation of the lock? Thanks!

  4. So surprised at the type of the pins in this lock and the resistance the lock had, with just simple undercuts. Impressive! 😀 I expected to at least some serrated pins in there and, some serrated chambers. Very nicely put together as well. Good pick as always Bill. 😊👍

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