Got these with the 41.5" folding rack. Seem to be durable. Only draw back for me is I wish they swing in opposite directions from each other instead of the same direction. Basically a right and a left. Other than that they are top notch.
Got these as extras to go with the power cage. Love them! They can get a beating and handle a lot of weight with no problem. Don't think about it anymore, just get them.
These j hooks are a bargain! They are lined with .UHMW (ultra high molecular weight) plastic so they wont hurt your bar. They hold 500 Lbs a piece for a combined weight of 1000 Lbs. They move simply and easily and make racking and unracking effortless and solid. The value and price cant be beat!