7.5-7.625 Govlock posi for 28 spline axles. I used one of these in a v-8 sonoma and it worked great.These are nice for mild street applications. This is a spare that I had. I am cleaning out the shop and getting rid of some parts that are taking up space. $100.00 or B.O. plus shipping. This fits 7.5 or 7.625 axle assemblies with 28 spline axles.