Hi Harald and welcome to the forum. The Tommy Ring is a 4 in tall cake run that raises the basket up from the bottom this get the food out of what I call the dead zone. See the SRG and The Big Easy heat the chamber to produce infrared to cook with. The problem is the heat element leaves a small space that I call the dead spot , very little heat so by raising up the basket you get into the sweet spot So that is the Tommy Ring in a nut shell.