I could tell you a story about a truck with that style of parking brake. The ink was still drying on my license and I was driving a box truck for a fairly large company. I set the parking brake and went in to see the customer. So I am talking to the guy and I look out the window that is above the door and there goes by a company truck.
So I am standing there thinking, Now why in the hell would they send two trucks to the same place to pick up one skid? It don't make sense!
Then the OH shit! moment! I said to the customer, One sec I will be right back. I go flying out the door and there is my truck rolling across the parking lot and here I am chasing down my truck. I caught it and got it stopped before it hit anything.
I am positive I set that brake. I may have hit it exiting the truck or it was not tight, Not sure.