The newest product by Dewla Dezign ® is this weighted Polished Aluminum Shift Knob.
This shift knob is more than 1/3 of a pound with the majority of the mass located in the upper portion causing a weighted effect. This increased height of the weight allows for increased leverage which in turn reduces time between shifts.
These shift knobs are 50% larger in diameter and 30% heavier than the Nismo shift knobs.