There is nothing more unique or eye catching than the look of a custom shift knob. Holley has taken customization to a new level by mating a custom shift knob and the iconic Mickey Thompson M/T logo to offer a clean classic look to your classic modern day ride! SAE Master Thread Kit - comes with the following adapters: 1/2"-13 1/2"-20 1/4"-25 3/8"-16 3/8"-24 5/16"-18 5/16"-24 7/16"-14