This aftermarket replacement free wheel locking hub is designed to fit CJ and Scrambler models from 1981 to 1986.It serves as a direct replacement for part numbers AVM426HP and B033HP.The unit features a manual type with a steel body construction.Technical specifications include 27 gear spline teeth, 5 bolt holes, and a pitch circle diameter (PCD) of 87.3 mm.This component is manufactured to meet specifications for functional equivalence.The package contains two pieces.Professional installation is recommended as instructions are not included.Please verify compatibility with your specific vehicle model and year before purchase.