The Racer X "Delrin Debbie" shift knob is designed to fit comfortably in your hand and increases feedback during shifting. The shift knob is CNC machined Derlrin and the adjustable aluminum adapter is threaded for an M12 x 1.25 thread pitch. It is laser etched with your choice of shift pattern and color. Weight is approximately 3.9 ounces, height is 2.5" and diameter is 1.95".