The TTT-002 has been replaced with the T3 device and its five prepackaged styles. The now made in USA device is two piece plated steel construction with hardwood knob. The grill specific packaging includes the correct accessory according to the grill vent.
KETTLE style would be used on Weber Kettle and other grills with the 5" thin daisy wheel. It includes the retaining clips.
Ceramic 4F would be