This is a transmission shift knob with a rubberized outer coating. The thread pitch is M10x1.5. These will fit the Jeep AX15.
 
I am currently developing a thread adapter so these can be used in Toyota's.
 
The base kit includes a new shift knob, an M10 jam nut, a 3D printed cap, and a Doomsday Diesel dome decal.
 
After installing your knob to the desired height, you install the jam nut to secure the knob. This prevents the knob from every spinning, no matter how hard you twist on it. You'll then install the cap. Wipe the cap the cap with rubbing alcohol to remove any oil/dirt. Lastly, apply the decal. Hold pressure on it for 30 seconds to activate the pressure-sensitive-adhesive. 
 
This is only the FIRST of MANY caps! Please stay tuned. The caps are interchangeable. Caps will be avaialble for individual purchase.