I have this tail on my heli and lost the allen key that is used to tighten the 2 set screws that are used to attach the adaptor for the tail blade to the motor shaft.This isnt the press on prop one

Well that sucks! Hehe, don't know what else to tell you other than go to the local hardware store and look for one that small. Or buy another tail adapter kit...it will come with one and it was fairly cheap.

Skarn