If you have an air compressor and a 3/8" drive impact wrench with the
correct size socket you can spin the nut off in an instant by simply
holding the blade with your hand. For those not used to impact wrench
behavior, wear a glove. Be sure to run the nut on finger tight first
when installing. If you're on a budget, an impact like the Harbor
Freight 37730 at under $30 will do fine. Porter-Cable is also marketing
Chinese knockoffs of the Ingersol-Rand line that are decent but heavy,
maybe twice the price. Good luck.

Joe