These are additional steel bushings for the 3/4″ Stabilizer.
One 3/4″ to 5/8″ and one 3/4″ to 1/2″ Steel bushing is included with your purchase of the Stabilizer. *This product is for those of you that would like an extra or have lost your original bushings.*
You can also purchase a 3/4″ to 3/8″ Steel Bushing, which does not come standard with the 3/4″ Stabilizer, in the event that you would like to be able to use 3/8″ tools.