This is a simple adapter where one end attaches to the multifunction arm (remixed model), and the other end has a female ½" BSP thread

Parts needed per arm:

• 2+ arm segments, depending on your needs. the ones in the photos are 2xsmall-arm-short.3mf
• 3+ pairs of nut-small.stl and screw-hand-small.stl
• 2 adapters (this model)