Improving Drilling Accuracy after Center Punching

[mklotz]

For a bit more accuracy in this technique, I use the pointy end of a double-ended edge finder in place of the 1/2" center. A fingernail dragged across the junction where the point meets the body of the edge finder can detect the tiniest deviation.

I use the same technique to center over holes, both small and large...

http://www.homemadetools.net/forum/h...ring-aid-26216