The Dynatrac ProFloat spanner wrench (DT DA60-1XT002-A) is the special tool for working on a Dynatrac ProFloat rear axle.
What it does
It fits the ProFloat's unique flange and lets you take the axle apart for service or repair. Dynatrac's line is that if you own a ProFloat rear axle, you will want this one in the toolbox.
Fitment
It is made for Dynatrac ProFloat rear axles. Dynatrac does not list any other fitment.