Hi Router
Do you bungee jump by chance
Dull bits are dangerous, they make bits for plastic and UHMW, they are made so they don't cut out as much stock in one pass but they are very sharp
and don't gull up with stock the norm, some have a oversize flute/furrow/helical grooves the norm is just one.
Some don't have flutes at all, they look like a steel deburing bits, the ones you can use in hand grinders air & elec.sometimes called die grinders,deburing tools.
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MIKE
Senior Moderator
Bj