I left them clamped in a vise while bending them. I slipped the handles off, left the pliers in the fully open position, and used the vise to clamp the hinge area (to absorb any heat that traveled down towrds the hinge area) leaving only the needle nose tips sticking up above the jaws. I use pieces of cut up scrap aluminum angle on the vise jaws to avoid leaving vise jaw marks on the pliers. I have a couple pairs of vintage junk pliers (arc joint and slip joint) that have heavily worn down or purposefully smoothed out jaw teeth. I use them when heating things up and/or working metal so I don't lose the tempering on my good pliers or leave too many tooth marks in the tool I am working. You can still see a couple plier marks on my pliers here and there. I could've finished them off better but I wasnt' trying to make a showpiece, just a useful pair of pliers on the cheap. I bent them by eye, no fixtures or specialty tools.