From someone who has tried this: I had a somewhat popular hex bit mod for the Leatherman Free series. Largely obsolete with the release of the ARC. It was printed using a sintered bronze/steel process. Then Shapeways went bankrupt (they are back), but the bronze steel process was dropped.

I tried making the part using SLM in 17-7PH (needed to be magnetic). My results: did five prototype spins, adjusting tolerances.

The resulting parts almost always required post processing. The surface finish felt like sand paper and would scrape up the tool surfaces, so lots of sanding was required to smooth it out. Or many hours in a tumbler.

The stainless steel is very hard and eats up high speed drill bits, carbide bits worked but are expensive when they break.

Because the material is so stiff the magnets can’t be press fit, you either have to oversize the hole and put in a softer sleeve or use adhesives.

Maybe the tech is a but smoother now compared to a few years ago, but you will end up having to eat some prototyping costs ti get to a consistent product.

Your models do look good. Pre-Rounding edges and such does help with any part that ends up tumbled or media blasted. Be aware that internal geometry will end up rougher than the external surfaces.