Good strong sturdy door chain. Very easy to install. Reasonable price too, even though you can't put a price on security.
Good Door Chain Lock at a very low cost. But, still easy for a determined thief to break-in on certain doors (using a wire coat hanger) when following the 'distance guide' by manufacturer! Oh dear! : (
Good quality complete with all fixings for wood and pvc
Jacknuts supplied in kit are rubbish. Only 2 of the 6 correctly deformed. 4 just twisted instead of drawing up to clamp in place