Shift knobs come and go but these are the best I have ever seen. I don't know how they are made and quite frankly I don't care. Simply put I think its voodoo, just flawless. Pete Chapouris

All shift knobs come with a 1/2-20 threaded master insert. 3 more inserts are included with purchase.

The threaded insert sizes are    -   3/8-24   -  5/16-18   -    1/4-20