Great Device

I read all the reviews and was a little concerned about errors in the decal scale. My 505A-7 is perfect, dead on. This is a must have tool for any woodworker. I don't know why something this easy was not around years ago.

Finally--

This tool (and its larger cousin) is a godsend for figuring funky angles and setting the miter saw to make accurate cuts. I've used it wood working, doing trim work, and remodeling. I even used it to figure the angles on the cross brace of a custom fence gate--the tool works everywhere there are angles.