CAD Puzzles & Riddles

Created by FredSWUG on 27 March, 2019

One feature. One simple part.

There might be multiple ways to solve this puzzle and I am always impressed with your creative solutions.

The dimensioned image comes from my favorite drafting book: The Fundamentals of Engineering Drawing and Graphic Technology by Thomas E. French

Blur your feature tree if posting a reply. Don't spoil the challenge for future puzzle solvers. Non-blurred solutions and speculation goes in the SOLUTION discussion.