It actually is more of a wrap that is adjustable to more that they advertise of you want to drill it out or in to fit your particular needs. I'm not a huge fan of the design, but I'm gonna keep an open mind. At this point I'm thinking about setting it up to go on my 18.5" WSM, but I originally had planned for it to go on my 22" kettle.
I'm glad I didn't pay $150 and I wish that the guy advertising his here for $60ish, had advertised earlier