beefy, high-quality carbon. The FPV Flyer resident was thrilled to use stronger arms in his latest build, the 3mm fiberglass he used in his first build just didn't hold up.
I've had these hands for almost three weeks now. (Did about 5 flights) So far they are holding up! I've definitely had a few bad accidents and none of them even broke their hands (other than scratches). I hope they keep up the good work. durable and if not I'll just buy more as they look really good :)