Ditch those factory locking hubs and get something hardcore! The Yukon Hardcore Locking Hub Kit. These hubs feature chromoly internals and all steel construction for the ultimate in durability and strength. With these hubs, you will never have to worry about them disengaging under high torque applications. The 1/3 turn engagement ensures quick changes between two and four wheel drive.Y ukon Hardcore locking hubs are not only great looking, but feature a low-profile design to minimize impact with obstacles, as well as a proprietary coating on the locking gears for decreased friction and a long service life.