Can you explain the bit size to me? Like the width and length of the cutting surface is 1/2 long - 3/8in width?
I'm not having much success with these burs and this die grinder. I actually prefer doing it with my hand drill because its variable speed. The bits jump to much, are a little to big , and catch to much; at least they have been for me...
Here's where I ended. I'm happy with everything EXCEPT the spots I can't reach and the part where the valve goes through. I can't reach some spots and when I start getting in there the burs kept catching, thats how I ended up with a broken bit; it barely caught, jumped and pow. The bent bit is what happened right when I turned my die grinder on, the bit just bent... well maybe ill get a dremel and do it with some smaller burs and slower speeds..
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