Designed for an '06 Honda Civic (should work with similar year imports). There is an outside which is what you would hold and an insert screws into the shift rod on the car. The threading inside the insert are 10 x 1.5. I printed the outside in Laywoo-D3 filament to get a classic wood look. This was my first big project using this filament and it worked out great! Hope you enjoy. The CustomShiftKnobCutout is for personalizing other things into shift knobs. An Instructable for more customization can be found here http://www.instructables.com/id/Customized-3D-Printed-Gear-Shift-Knobs/Outdise- Printed using default accelerated print settings on a makerbot replicator. No raft no support. Worked out pretty well, but because i used Laywoo-D3 it had a hard time filling holes at that speed. I would suggest non accelerated setting for Laywoo-D3 otherwise it should work great for ABS or PLA. Inside- Printed using default accelerated print settings, 60 percent fill in. No raft no support. The more fill in the better because it has to bare the strain of screwing on the the shift rod.