These are conversion parts of the Combiner Wars Blast Off. You can change a vehicle mode into a space shuttle by being attached to a helicopter-shaped soldier of CW. The root of the wing is a combination of hinge joint and ball joint. You can move it without letting it interfere transformation and combination.
When you change the parts of the body part, it is necessary for you to pull a pin. In addition, as for this, two screws of 6mm of the M2 are necessary for assembling.