Soft jaw for the Harbor Freight 61329 Vise. I print them with the face down, 100% infill, with whatever filament I have loaded. The recess fits an 8x3mm magnet with a press fit. I don't glue them in so I can get them back out for resue. These are sacrificial so I print several at once and toss them when they get screwed up after using side cutters to release the magnet.
I doubt Harbor Freight has good tolerances on the jaws so you may need to scale slightly.
The author marked this model as their own original creation.