Thank You all for making ideas, that's very helping me and shortens time. I made lockpicks "rating" and change it's repair method, but i choose another because it's weird in first concept: one bad quality lockpick magically consumes other lockpick and repair itself; and second concept: duct tape acts for lockpick like bandage for humans and regenerate lockpick (also magically); i think i made more realistic concept: some small welding machine and fusible material repair lockpick.
Viewing post in Advanced Education with Viktor Strobovski comments
I worded 1st concept weirdly... It was basically like the current repair system, broken lockpicks being repaired with duct tape. You don't combine lockpicks together. Still unrealistic though.
Ex: (Fair Lockpick + Duct Tape Piece = Perfect Lockpick)
I can't argue with the 2nd concept being unrealistic, was only thinking of game balance then. Anyway, welding machine seems like a great idea for realism, instead of having broken lockpicks repair forever-and-ever when just using duct tape.