Not certain the two outer/unmarked collars are Roberts but they came with them and seem to match up as far as bar fitment etc, the threads all seem decent and have been oiled and are functional, the threads on the unmarked collars are nice but the locking threaded bar would need to be forced to remove it all the way, I think the innermost threads have mushroomed from clamping on bars over the years so I didn’t force them I just left them in, besides that they turn and clamp freely, collars have been repainted with a non original pink paint which is chipped and missing in spots, missing paint, collars were just wiped down with 3n1 oil and function as should with the exception of not being able to remove the threaded bars on the unmarked ones without forcing them, they look to be barely over 1 inch so they probably do not fit much bigger diameter barbells than a 1 inch, please look closely and ask any questions before buying and thanks for looking!