These came in today.
Matco aluminum insert impact socket:
Made in USA!
aluminum insert held in with a steel pin:
Matco vs. Snap-on vs. Craftsman (13/16"):
Having never seen these before, I expected them to be an oversized impact socket with an aluminum sleeve inserted to bring it down to the proper dimension, but instead, it appears they are a thin-wall socket sleeved with aluminum. In the 13/16" size, the Matco is about 0.04" smaller on the OD than the SO and 0.06" smaller than the Craftsman. I guess they aren't meant for really hammering on a stuck nut, but hopefully they work well enough and protect my lugs. I'm thinking of maybe adding some shrink wrap on the OD to help protect the finish on the wheels, especially since I have some spare room with the smaller OD.