Bought this for an old mountain bike from the 1990's. I don't have the tool to remove the old one but once my local bike shop had removed the old one, installation was a breeze. It just screws on and as you ride it tightens itself up. Since installing this, and a new chain, gear changes have been crisp and precise - everything that you could want from a cassette.
Bought this to replace a worn freewheel which was causing the chain to slip under pressure. The previous freewheel was on quite tight and took a bit of effort to remove but once removed this was very easy to fit with the correct tool (recommend Cyclo freewheel remover and not the hub/cassette remover as this will not fit).
The freewheel arrived promptly in a neat Shimano box and feels like a quality product but at an affordable price. Having always trusted Shimano products, this did not disappoint.
Fitting was just a case of screwing onto the existing thread and tightening with the tool and an adjustable spanner.
Pleased to say this solved the issue of the chain slipping. A very happy customer and won't hesitant to purchase again when needed.