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 slip fit. When I print it in ABS, it is a nice tight fit. Your mileage -will- vary. ABS will be most compatible with your Lego kit. I am reminded to note the part this engages with: Lego part 32072: "Lego Technic knob wheel" https://www.bricklink.com/v2/catalog/catalogitem.page?P=32072#T=C ,