What specific area did Linus Yale Jr. focus on to make the design more resistant to picking?

Answer

Precision manufacturing and tight tolerances on internal components

Linus Yale Jr.'s improvements centered on precision manufacturing, specifically focusing on the tolerances of the pins and the quality of materials used, making unauthorized alignment minuscule.

What specific area did Linus Yale Jr. focus on to make the design more resistant to picking?
inventorlockYaleLinus Yalepin tumbler