These rotors are for use with big amp mags.
Anything over 7 amps and the rotor tang can overheat and come loose. The high-temp rotor has a special heat sink ring tang on it to absorb and dissipate the extra heat. The tang is epoxied in place so it cant come off.
Right Hand Rotation (RH) clockwise.
Includes 2 nylon screws that prevent the rotor from turning or lifting from the adapter.