2 tools to repin a lock, one to hold them down while removing or nserting cylinder. The other one is then insertet, it has a helix cut to remove one pin after another.

This Plate is also handy for repinning locks: https://www.thingiverse.com/thing:2760344

Edit: Added variants with bigger slots. Original has 3mm, new versions 3,5 and 4 mm