These high performance scale rotor heads consist of an all metal assembly, dual ball bearing heavy duty plastic blade grips plus thrust bearings which feature the I.G.D. system (Individual grip damping) to dampen each blade individually to eliminate turbulence vibration which is crucial for super smooth flying with mulitple rotor blades.

Features:

For all helicopters with 10mm or 12mm main shaft. 16mm blade root. 5mm bolt holes.

This rotorhead requires main blades with 5mm bolt holes. Using this on a 30 or 50 size RC helicopter (which typically uses blades with 3-4mm bolt holes) may require you to enlarge your main blade bolt holes to 5mm.