
My doors are old and the local brick and mortar manufacturers took me to their shops to no avail. I spent a lot of time trying to figure out why the old lock wasn't working. The broken piece isn't noticeable until I take it apart. I don't usually read instructions until I'm stuck. I don't recommend not reading the instructions, but be aware that it only took 5 minutes to install, including a slight downward adjustment of the locking device it slides onto. My old set was white but I like this one better, it's easier to see the whole thing and also see the locking mechanisms. I was so pleased that I bought another one for the left side instead of waiting for it to break like the right one. Why not? The price is great.

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