These are like the other threaded adapters we sell – but this one has 1/4 - 20 thread on both ends.

We created these adapters for folks who want to use our Ultimate Sanding Kit but already own a Grex, or other sander that has a 1/4 - 20 threaded female receiver. These adapters have a 1/4 - 20 thread on both ends, so they fit our Roloc mandrels and many different brands of sanders.