Mini Spool For GM 8.5 Inch, 28 Spline USA Standard GearUSA Standard Gear parts give you performance at a price that will not break the bank Fits GM 8. 5 inch with 28 Spline Installs into a standard open carrier case Provides 100 percent traction to both wheels at all times Not recommended for street driven vehicles Mini spool 1 year warranty against Manufacturer defects Features and Benefits: Fits GM 8. 5 Inch with 28 spline axles Installs into a standard open carrier case Provides 100 percent traction to