The wheel and holder by themselves are fine and I have no issues with them. The package I received has basic instructions that says "no tools needed, just snaps in place”. For about 3-4 days I tried to snap in place and found this was not going to happen. The package comes with two sets of wheel, holder and a plastic retainer that is meant to keep the wheel from falling out of the holder when installed. The problem I had is the retainer is about 1/8” thick and slightly wider that the hole it goes thru. Once on, I could never get the wheel shaft to go thru the holder. I found another solution and everything is working fine now. The retainer is a bit too big for the purpose intended.