For the Do-It-Yourself builders out there we have finally made an adjustable wrench that fits all manufacture/brands of -AN fittings.
Adjusts by spanner thumb wheel. Anodized black 6061 aircraft aluminum. By using an aluminum wrench it will not scratch your aluminum -AN fittings when properly used.
If installing fittings while on the vehicle, we suggest you purchase 2 of these wrenches.