I have bought some threading bits, but forgot to buy the corresponding handle to use it, and itis not very easy by hand :-) So here is a simple handle to use those bits.

Example of corresponding bits (not affiliated, just for the example) : https://fr.aliexpress.com/item/32788074995.html?spm=a2g0s.9042311.0.0.27426c37SDmRBs

Please note that as my printer is not very precise (and I print in very draft mode), I have to add an extra 0.5mm space in the holes to have to proper size. If your printer is different, you may use the provided Fusion360 source file and change the parameter PrintMargin.