I am trying to replace my interior door knobs and encountering one obstacle after another. The latest is that my doors are prepared for drive-in latches, and I stupidly assumed they were "standard", but in fact they appear to have 7/8" latch bores rather than the standard 1". The drive-in latch I purchased DOES fit if I don't put the collar on; is that crazy? A recipe for disaster?

Help :(

  • Those collars are optional and just provided for when they're needed, in my experience. What's your specific concern? Are there moving parts contacting wood? – isherwood Oct 9 '20 at 21:25
  • I also think you're taking liberties with the word "standard". :) – isherwood Oct 9 '20 at 21:26
  • The specific concern is basically that I don't know what I'm doing and don't want to make a big mistake :) With the collar on, the latch doesn't fit. Without it, it does. Seems to me like it shouldn't be totally necessary because the knobs will keep it snug in place once they're attached, but let me repeat, I don't really know what I'm doing and don't want to make a big mistake! – user3128241 Oct 9 '20 at 21:31
  • 1
    does the packaging, or the instruction paper, say that your latch is suited for 7/8 and 1" bores? – Jasen Oct 9 '20 at 21:46
  • @Jasen I don't see anything about the latch bore sizing on the packaging or instruction manual. The website does talk about 1" bore latch, and that's what the latch measures with the collar on. – user3128241 Oct 9 '20 at 22:59

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