This is a set of adapters specificially for a Transformers Superlink/Energon Bruticus Maximus. There are 4 adapters in this set. 2 are for Helicopter Limbs and 2 are for Tank Limbs. This creates a 5mm port in the centered on the end of the combiner limbs and allows you to attach The Combiner Wars Hand and Foot accessories to Bruticus Maximus. By extension, Bruticus Maximus will be able to hold weapons with 5mm handles.
The 4 adapters are attached to each other. You will need to separate them and trim off the excess plastic with a hobby knife or plastic cutters.
This was tested with my home printer, printed in PLA plastic. When fitting the part press firmly and evenly. Depending on the plastic you choose, sanding or polish may be needed to fine tune the fit.