What makes the lock a bit unique is that it's sort of a door bell and deadbolt in one. (digitaltrends.com)
Apart from sliding frames, a lot of sorts of doors are also available in UPVC. (homeverified.ca)
Somehow I persuaded Mick Jagger to give us an interview, and that opened all sorts of doors for us, since Mick Jagger hardly ever gave interviews. (canadianbusiness.com)