This a tool similar a Bergeon 30110 Balance & Hairspring Holding Adjustment Tool. Size Ø35mm with holes Ø0.60mm to Ø2.80mm and tapered slot.

Supports: 

No

Resolution:

0,10mm - 0.50mm

Infill: 

15%

Filament material: 

PETG

Nozzle: 

0.4mm