[bigiain]

It looks like it's called a "lock gun", that's what I found them called when I went looking for one on Ali Express. Just a little plastic pistol-grip handled tool that he selected a metal blade on and stuck in in the keyway and pulled the trigger as he wriggled it around and twisted it. The first lock took him 2 tries at the right blade and took him a minute or so, then second lock he got the right blade first try and was in in under 30 secs...

I kinda knew "ordinary domestic locks" weren't very secure agains skilled lockpickers, and I don't know if there's some hidden technique required to use those things - but I was astounded and dismayed at how quickly my two different locks fell to such an easily available tool...

[PascLeRasc]

It's not like the system he was cracking was very secure. It has to be regularly openable with just a piece of metal, with tolerances so that when your key teeth wear down over the years it still works.

[Zak]

A pin/tumbler lock can be made considerably more secure against the attacks that work very quickly than most of the ones found on houses in the US actually are. Simply using security pins will significantly reduce the effectiveness of lockpick guns, rakes and bump keys.

In short, standard pins in locks only have one place they're likely to stick when manipulated under tension: the shear line that allows the lock to open. Security pins have additional grooves machined into them that will make the pin stick at points that do not result in the lock opening. It's still possible to pick locks that have them, but it often needs to be done one pin at a time, which is usually slower and tends to require more skill.