Accurate measurements are key to choosing the right smart lock. This step-by-step guide shows how to measure your door, mortise, and frame to ensure a perfect fit. Ideal for smart lock installations.

1. How to Measure Backset
- Common sizes: 60mm or 70mm.
- Measure the distance from the edge of the door to the center of the existing hole where the lock is installed.

2. Mortise Lock Measurement
- Measure the height, width, and depth of the mortise lock.
- Check the placement of the latch and deadbolt positions.

3. Door Thickness Measurement
- Measure the thickness of your door from one side to the other.
- Standard sizes: 35mm – 90mm.

4. Striker Plate & Frame Measurement
- Measure the length and width of the striker plate.
- Check if the door frame is made of metal or wood.

5. Door Gap Measurement
- Measure the gap between the door and the frame.
- Ensure there is enough clearance for a smart lock to function properly.

6. Additional Considerations for Grille Doors (if applicable)
- Door-to-Door Distance: Measure the gap between the grille door and the main wooden door.
- Grille Door Thickness: Ensure compatibility with locks designed for metal frames.
Final Checklist Before Purchasing a Smart Lock
✅ Ensure all measurements match the lock’s specifications.
✅ Consider the type of smart lock that fits best (lever handle, push-pull, rim lock, deadbolt, etc.).
✅ Check if additional accessories are needed for installation.
By following these steps, you can confidently choose a smart lock that fits your door perfectly.
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