The function of the blade grips is pretty straight forward. Hold the blades on the head, and allow them to pivot according to the swash plate. It's made of either plastic or aluminum. I don't recommend the aluminum one as it transfers too much force to the head in a crash thus resulting in costly repairs.
Here's both versions:
BLH1617 plastic blade grips (7$)
BLH1617A aluminum blade grips (30$)
Here's a diagram on the blade grips assembly:
We are now a distributor of the CarbonCore frames and parts!
Click the shop for more information!