Greenlee Knock out sets

[PaulMmn]

So I would say replace them and not try to sharpen reshape them? That is what I am getting that would save time, be reliable when my guys need them in the field. Cost more now but pays for itself when the time comes.

I'd compare it to sharpening saw blades or chain saw blades-- takes care and patience-- and the right tools. If the sharpening heats the dies and they lose their temper, they may make a few punches, but quickly go dull.