The smallest brad point is probably the 3mm, which I guess is a hair smaller than 1/8". The reason I mentioned them is when I was cutting out the parts for a wooden gear clock, I needed some precise holes in several places. I started buying good Brad Point bits, from Lee Valley, buying individual bits of the size needed. Now I add to that collection from time to time. If you get into things that work with gears, like the clock, robots, etc. you will need to have some good bits to drill the holes in the wood.