Lego Technics Driver to 1/4" Hex Adapter

This is a simple part to adapt a 1/4" hex bit to be driven, or doing the driving, of your Lego Technics and Mindstorms creation. This is a small part of a project I'm working on using Lego EV3 to manage motion and sensors.

Total thickness is 15mm | 8mm thick base.

The hex size is 6.7mm. This part is very scale tolerant so you can scale the part for a different fit of the 1/4" hex anywhere from being a loose fit to rigidly fixed to the part.

When I print this in PLA, the hex is a sli