Solid attachment that is good for curling or push down moves. Knurling is good, not passive but does not eat at your hands. This was free when REP gave points.
Questionable knurling but my wife loves them. I have 2.5lb jumps 2.5 to 30 lbs. free shipping and on sale often. These are all out of the same factory. Many times sales are cheaper than used.
Very loose fit. I have the plastic Titan collars that hold a lot stronger than these. These look great in red but if they don't really hold it's not a good choice.