In depth explanation of several types of security pins and their interaction with the shear line. I've also added a couple counter-milled chambers to give an example of what additional security they can provide.
Security pins increase the lock resistance to picking, raking, bumping and other techniques by quite a lot comparatively, and adding them is probably the single cheapest solution to better security for a common lock.
Looking for some decent locks?
American Padlocks: https://amzn.to/2LURssA
Abus Disk Detainer Padlock (88/40): https://amzn.to/3gaylZs
Mul-T-Lock Junior (House Format): https://amzn.to/3bVmmvp
Mul-T-Lock MT5+ Padlock: https://amzn.to/3cZ0KQk
Looking for the best Disk Detainer pick to pick the widest range of locks?
Consider my Silver Bullet: https://lockfall.com/product/silver-bullet-3d-printed/
or DIY Kit: https://lockfall.com/product/silver-bullet-diy/