Thanks for the info, Dave. I didn't know that CVA and Traditions had locks that small. That seems pretty tiny. Have you used any of yours? I didn't include a tape measure in my photo, but these are really small; 3/8 x 3/8 most of them, with some being even a bit smaller. I guess whatever makes a spark can work. At least one appears to be Dover flint, and the lighter brown look like chert. Agate. Interesting... Thanks again--JB