The Tri Hot series putter was a 3 model series released by Odyssey in 2001. It is not be confused with Ti-Hot or Tri Force series of putters. They are a great putter design made of milled carbon steel with a nickel plating finish. The insert was the White Hot elastomer, backed by a dense tungsten weight forming the bumper of the putter. This concept located the center of gravity towards the rear of the putter, further behind the ball than most putters at the time. The tungsten piece is affixed in position with small dowels and bolts, with an elastic layer between the tungsten portion and main body of the putter. They can be disassembled and modified into quite a unique prototype putter.
We are aiming to one day have options available for all three Tri Hot series, we are nearly there. A great example of what can be done with a Tri Hot can be seen at this link (the excellent work of Chris Finch Golf):