I'll use the set-up block as my note pad to write down the correct measurements. The shape is a good visual clue. I'll be looking all over for the measurements and when I give up and grab the setup block - I'll find the dang measurements. I think I have the Rockler bit so I don't have a ton of faith in how long it will last. So far it has lasted almost 10 years and shows no wear and is as sharp as the day I bought it, haha.