GM-52009 is a set of three adapters. These three adapters and the GM-46625-10 90-degree Adapter all attach to the GM-46625 Transmission Holding Fixture and then attach to the Bolt EV 1ET25 transmission. The GM-46625 Fixture Arbor fits into the GM-3289-20 Bench Mount Adapter to securely hold the transmission at workbench height, allowing 360-degree rotation of the transmission for internal service procedures and part replacement.