PB Swiss makes really excellent tools. the PB Swiss 6510.R-30 and 6510.R-100 and perhaps others are really great but the bits rattle inside the handle. I designed this part to be printed in TPU to hold the bits more tightly and prevent rattling. The rattling made a very high quality tool feel cheap but now it's pretty close to perfect.

You do need to print this in TPU or other flexible filament. PLA won't work.

If you print it and like it, let me know!