Daryl, L & R's frizzens have a piece of steel integral with the pan cover that fits INSIDE THE PAN. They do not have a raised rim like the one you showed, which is very nice, I must say. I believe the idea of the protrusion on their frizzens is designed to block light from showing through, demonstrating the fit of the frizzen to the pan. But in my experience, there is nothing wrong with their fitting. They are as tight or tighter than other locks I've used.