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Only problem I have had with the snapping center punches is they can break the old celluloid or bone and ivory scales at the pin...happened to me a couple times. Fine for horn and other slightly...

In that vein, here are some other things which work well for me!
Cheap tools for razor restorations
~Richard

Thanks for posting this method! never got round to it.
I have a couple older Dremel drill presses with the base that rises and the tool stays stationary and the above methods work very well for me...