Rock Steady Robinson Rib Clamp Base: This base clamp fits the window center rib channel on any Robinson R22, R44, or R66 Helicopter. This clamp can be easily tightened by hand making it a FAA temporary mounting device. The thumb screw also has a hex drive head allowing you to tighten with the included hex wrench too. This Clamp Base is compatible with all Rock Steady mounts.
