Torque Solution Delrin 50mm Round Shift Knob (White): Universal 12x1.25Torque Solution Delrin Round Shift Knob ( White ) Applications: Universal 12x1. 25 Torque Solution 2" round shift knob is made from an aerospace polymer Delrin material. Delrin material is impervious to heat and cold. Making it an excellent choice for racing applications and for daily driving in hot and cold climates. It is also not slippery and will not rattle like some metal knobs do. The hole extends as deep as possible to give you the lowest