check new version might be better for you https://www.thingiverse.com/thing:7218837

finally i finished my dream project. i was looking for it for a long time but as you know guys there is no free project like this. btw, it is working really cool. i made it and test it and it's very usefull tool. i hope you guys will like it and may be support me for my future free projects. Thanks.

Part list 10mm linear bearing X 4 10mm bar 30cm X 2 32mm x 12mm hole bearing X 2 1/2 Unf 20 bolt X 1 (this is for 1/2 chuck) you may use another options(3/8 chuck with 10mm adapter) if you find. 5mm and 6mm screws with nuts. Pls watch the YouTube assemble video. It will help you

https://youtu.be/ckdEGbicLNI