Details
Pack of 10 spare grub screws for fixing screwdriver blades of the following brands: Beco Technic, S1 Deluxe, Bergeon etc. Grub screws also known as fixing screws or set-screws are extremely small and we recommend having a 1.60mm screwdriver on hand when installing it. Grub screws are also used in other watchmaking tools, e.g. bracelet pin punches.