Been a hobbyist lock picker for some times now (3+ year i guess), milling cut-offs locks to practice picking using my own tools. Been moving on to 3D printed picker now

I have a question about this key:

It's my mail box key which half the time gets stuck, which got me wondering how its mechanism works with square cuts?
Is there a way to create a bump key for this one?
Would love to hear your opinion and advice!
Thanks!