Production of the G-Type rotor was discontinued 14 years ago, though many are still in use today. If a G-Type rotor needs to be replaced, the PGP-ADJ or PGP-Ultra is the current equivalent replacement.
The Hunter adjustment wrench consists of a 3/32 allen key, two convenient finger loops for gripping and an opposite side arc adjustment key for all your Hunter rotor adjustments. The Hunter wrench can be purchased from your local distributor. You can also use a 3/32 allen key for radius adjustment only.