This 3D print is designed to get destroyed, and it’s the most useful thing I make

I bought my first 3D printer expecting to make toys, gadgets, and the occasional product prototype. Instead, one of my most useful prints is simply a plastic clamp whose whole job is to get chewed up by my CNC bit. Plastic clamps save my bits when a cut goes wrong, but buying injection-molded ones over and over got old fast. Now I print them for pennies a dozen at a time.