Years ago I bought a large set of bits on clearance from Sears for like
$15. I figured what the heck... less than $1 a piece and the box alone
was prolly worth $15. Wouldn't you know, I can't destroy these things.
I even routed a couple hundred feet of 1X using the core bit, three
full depth passes, and the bit still cuts fine. I still wonder if my
M12V affects the bit performance...