I bought these when building my first own speaker cab.
I've always been annoyed by the standards in marshall cabs and most other 4x12s. The angle on those end up hurting you wrist.
Ampeg cabs on the other hand, splendid handles.
So I bought these being the ampeg handle type.
Works just as expected. Until you start playing loud.
Then they start to rattle, audibly. Had to stick a bunch of cloths in them when recording.
Could probably be fixed by glueing some thicker molton or other in them. But on the other hand, the ones in my ampeg cabs stay quiet.