Those are nice. I remember using my first set of panniers about 20 years ago; they did not have this locking mechanism, I went over a bump, and all of my groce

Those are nice. I remember using my first set of panniers about 20 years ago; they did not have this locking mechanism, I went over a bump, and all of my groceries spilled all over the street. I ordered a set of Ortleib panniers a few minutes later, and have not been disappointed in the intervening 20 years.