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FAQ

Will Your New Door Hardware Replace My Old Door Hardware?

For interior doors, our doorknobs and backplates are compatible with most old mortise locks. Exterior doors, however, will likely require retrofitting by an experienced carpenter.

Generally, replacement door hardware won't necessarily fit or cover all the holes drilled for the previous door hardware - there wasn't and isn't any one universally employed configuration, especially on old doors. We suggest hanging onto your old mortise locks, tube latches, and strike plates until you've got our new stuff in hand.

Dimensions which might help you check for new/old hardware compatibility on interior doors:

  • Keyhole-to-knob spacing is 2-1/4", center-to-center; 9/32" spindle set "on the diamond" for correct knob orientation (especially helpful for oval knobs).
  • The spindles are a standard 5/16" thick. Longer spindles will probably be required for doors over 1-3/8" thick. Contact Customer Service for longer spindles.