Abstract

I would like to state here that I have always attributed the original idea of this drill bit to Performance 3D and repeatedly emphasized that it was just a secondary creation based on the version that was not yet available for download at that time. Since I designed and publicly shared this version on my own, Performance 3D has officially launched its own version on its official website. Later, 3Dprint.com intended to write a feature report on this drill bit, but I declined their invitation and actively introduced them to Performance 3D. Therefore, I have no intention of stealing others' achievements; all I did was to share with everyone

This is the secondary design and optimization of the hand drill provided by Performance 3D LLC that I have carried out

Three new chuck specifications have been added

Video link: [http://youtu.be/ut9gKJPn2f4](http://youtu.be/ut9gKJPn2f4)