Folks,

Looking at the possibility of 'rounding' the wall-roof line with a round-over routing blade. My question about round over bits is this...

If one is described as a 1/8" does that mean it takes 1/8 inch on both sides of a right angle and a 1/4" takes off 1/4' of of both sides?

OR

does 1/8" mean the bit takes 1/16" off each side giving a TOTAL of 1/8"

and 1/4" means the bit takes 1/8 " off of each side giving a TOTAL of 1/4"

If someone could clear that up for me, I would be grateful...

Jim