I've tried a bunch of different traps, and these are my favorite. These reusable traps fit very well between the frames. Most of the other traps, especially the throw-away traps, do not fit well between the frames without moving the frames apart. Since they don't fit, it causes a slight gap above the frame which provides a place for the beetles to hide. I believe that gap makes it harder for the mites to get on top of the trap and therefore makes it difficult for them to enter the trap. The foxhound reusable traps do not have those problems. They are also easier to clean than some of the designs.
I will note that the dimensions seem to be incorrect. The description says they are 10" long, but I measured 9".