There is a threaded section on the back of the thermometer (44mm long that takes a 32mm wing nut (included This thermometer ranges from 100 degrees to 800 degrees in cooking temperature Accurately measures temperature inside barbecue grill It is stainless steel and very, as you just insert the through the hole on your pit / smoker / grill and then attach the nut, which is included Thermometer Face Diameter: 60mm Total length: 80mm, Manufacturer: NEWFT