This adapter fits the Granite Earth dome drive and allows you to install Pixelfiend's geared dome setup. It has 3 screws for attaching to the motor shaft after you cut it to length. It's best if you can file flats onto the shaft for each of the fixing screws. If you have a dome plate right on top of the gear set, you will want to countersink 82 degrees for flathead screws. Theadapter comes with both capscrews and flathead screws

When you order your gearset from Pixelfiend, tell him you are using this adapter and he will drill the proper holes in the pinion.