This modell contains of 3 Parts.
Left Arm (Part 1)
Right Arm Part 2; this one)
Brooche (Part 3)
There is just a M3 grub-screw of 10 - 12 mm for each side nesseccary to connect the sidearms with the brooch. So Parts also always can be updated.
If you choose the stainless-steel, you can edit this material by painting or galvanisation.