Hole Diameter:both holes diameter is 3mm
Universal Joint Outside Diameter:7mm
Universal Joint Length:13mm
Screw Size: M2
Allow the angle between the two axes within a limited range vary with operational needs.
The metal universal joint is suitable for straight shaft motors,use for model cars, model ships, robots and other types of metal transfer.
Used in RC Helicopters, Boats, Planes and Cars, etc.