This is a customizable hex nut driver that can be used as a tool or dedicated knob. The NUT TOLERANCE variable allows for relaxing the hex opening, so you can compensate for printer/material variance as well as preference. Generally a knob will require a tight fit (lower NUT TOLERANCE value), while a tool must be looser (higher NUT TOLERANCE value). Review the included illustrations for details on how to use. Open in Customizer and enjoy.

Material, infill and shell do matter so use your best judgment considering the loads you will be targeting.

UPDATE (Nov 5th, 2018): Added Shaft/Bolt/Rod size setting for finer control and better fit.

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Monoprice

Maker Ultimate

Doesn't Matter

Doesn't Matter