Fan Hub Holding Tool. Keep the fan hub from turning so that you can easily remove the 4 retention nuts. No slip; No hassle; No scraped Knuckles; No Cussing.
Specialty Tools Universal Fan Clutch Holding Tool
Evercraft Legacy Fan Clutch Pulley Holding Tool 776-3139 - Universal
Motorcycle Clutch Flywheel Holding Tool, Clutch Hub Basket Gear Holder Tool