Measuring Tape Compass

[HandyDan]

 

[John Morris]

Pretty flipping cool Dan! Thanks for sharing this one.

[4DThinker]

A trick I learned in my first junior high woodworking class. We used a finishing nail rather than a screw though.  Nice to see old tricks are not being forgotten, or at least are being rediscovered as time goes on.

What I've been expecting as technology advances is a "smart" tape measure that can be used to draw elipses, squares, or any-sided polygons.    Equilateral triangles I can do.

4D