Screwdriver Handle

thingiverse

This screwdriver handle is specifically designed for use with bit holders, which can easily be sourced from most hardware stores or Amazon, where I purchased mine - https://www.amazon.co.uk/dp/B01875O528/ref=pe_3187911_189395841_TE_3p_dp_1. The ergonomic design of the handle makes it comfortable to hold in your hand, with a rounded shape that reduces pressure when pushing the screwdriver into screws. Keep in mind that you may need to adjust the scale of the handle up or down depending on your printer's tolerances. I printed mine so that the handle would have to be hammered onto the bit holder. If the bit holder is too loose in the handle, it will quickly wear out the hole.