Handles for pulling yourself up onto the wing

FYI....the C I bought a few months ago already had them installed. They’re great!

Daaa... found them, ordered them, they were right there in our newsletter all the time, daaa, dumb me.

I've seen some place a handle (set of two) for assisting the pilot and passenger up went climbing onto the wing. Don't remember where or how much or even if they work? Anyone using them?