I too have heard stories but I use them all the time and have never had one come out... for that matter I have never had any bit come loose in my about 30 years of using a router.Birchwood said:Hey you guys: I have a 1/2" shank 1/2" but solid carbide spiral up-cut bit I have never used. My wife bought it for me couple years ago and I have never used it. Part of the reason is I keep reading horror stories about spiral bits eating projects, destroying workshop, maiming humans and destroying cities. Is it ALL true? I saw a similar bit and it was $60. Maybe I should put it on Ebay huh?