I use this handle to many of my projects I like it a lot and will will like to share it with you.

Simple.. if you have it pre printed and stored in your workshop you will find use for it !

Use M6 hexbolt/ Unbrako for metal or simply use a wood deck screw if mounted on a wood surface.  

Printing: I use PETG but think most materials will work fine here 0.4 nozzle and 0.2 layer height and around 4 walls and 25% cubic infill will make a quite strong handle.  

Note ! STL file is for 2 handels (you can´t get to many ;-)

Enjoy !