This lock is very well made and operates smoothly. I spent quite some time searching for a compatible lock to replace the 32 year old lock that recently broke on my aluminium framed patio doors (original from when the house was built in 1986). Safe.co.uk had exactly what I needed and it matches perfectly. The price was very good and delivery was very swift (just what you need when you have a door you cannot lock!!). I'd be more than happy to recommend this product as well as Safe.co.uk for quality, price and service. I'll certainly use them again in the future.