This listing is for OSHM1002 OMPHOBBY M1 Feathering Shaft Set (2pcs).
The feathering shaft (also known as a spindle) on a dual blade helicopter connects the blade grips along a rotating center axis. In an accident it can become bent. A damaged feathering shaft won’t allow the blades to track properly. The OMPHOBBY M1 helicopter won’t fly well with a bent feathering shaft and it could become a hazard. For an assembly diagram please see the OMP Hobby M1 PDF Instruction / repair manual here