Short answer: A double-bore smart lock uses separate round door preparations for the deadbolt and latch/lever, while a mortise smart lock uses a larger rectangular pocket in the door edge for an integrated lock body. They are different hardware architectures and are not normally interchangeable without evaluating—and sometimes substantially modifying—the door.
Start by identifying the existing door preparation. Do not select a smart lock from its access features alone. The faceplate, bore pattern, backset, handing, door thickness, frame clearance, strike, and any multipoint mechanism must all be compatible.
Double-bore and mortise lock preparation at a glance
| Feature | Double-bore preparation | Mortise or multipoint preparation |
|---|---|---|
| Door opening | Two round face bores, usually stacked vertically, with edge bores for the latch and deadbolt | A routed rectangular pocket in the door edge for a lock case; multipoint systems may connect to additional locking points |
| Lock components | Separate deadbolt and latch/lever components | Functions integrated into a lock case or multipoint mechanism |
| Common planning issue | Bore spacing, backset, edge-bore alignment, and trim clearance | Exact lock-case dimensions, faceplate, spindle and cylinder locations, handing, multipoint geometry, and door brand/model |
| Field modification | May be straightforward only when an existing preparation matches the required dimensions | Often requires exact manufacturer-specific compatibility and experienced installation |
How to identify a double-bore door
A double-bore door has two main circular openings through the door face: one for the deadbolt and one for the latch or lever assembly. On the edge, separate bores and faceplates align with the deadbolt bolt and latch bolt. Measure the center-to-center spacing between the two face bores, the diameter of each bore, each backset, the door thickness, and the available clearance around trim or glass.
The Ora FacePass FP01 MY26 uses a double-bore deadbolt-and-latch architecture. Its published fit information calls for a 2-1/8-inch face bore, 1-inch edge bore, 2-3/8- or 2-3/4-inch backset, and door thickness from 1-3/8 to 2-1/8 inches. Those measurements do not replace a complete door check; the relationship between both bores and the surrounding trim must also work.
How a single-deadbolt preparation differs
Some smart locks use one primary deadbolt preparation rather than a double-bore layout. The Ora FacePass FP02 MY26 is the compact single-deadbolt model in the MY26 range. Published fit information includes a 2-1/8- or 1-1/2-inch face bore, 1-inch edge bore, 2-3/8- or 2-3/4-inch backset, and door thickness from 1-3/8 to 2-1/8 inches.
A compatible face-bore diameter is not enough by itself. Check exterior and interior escutcheon clearance, the condition of the existing deadbolt, the strike location, door alignment, and whether a nearby handle or decorative plate interferes with the lock body.
How to identify a mortise or multipoint door
A mortise lock typically has a long faceplate on the door edge and a rectangular lock case installed into a routed pocket. A multipoint door can engage hooks, rollers, bolts, or other locking points along the door edge when the mechanism operates. These systems vary by manufacturer and model, so visual similarity does not establish compatibility.
The Ora FacePass FP03 MY26 is intended for compatible Pella multipoint entry doors and uses a mortise-style multipoint architecture. Confirm the exact Pella door model, existing multipoint hardware, handing, backset, lock-case dimensions, spindle and cylinder locations, faceplate, and all relevant measurements before modification. Do not use a standard deadbolt drilling template for the FP03.
Why conversion can become a door project
Changing between architectures can require filling old holes, routing a new pocket, reinforcing the door, replacing the strike, adjusting the frame, and correcting trim or weather-seal interference. On exterior, commercial, fire-rated, egress, or warranty-controlled doors, an unapproved modification can create code, listing, performance, or warranty issues.
When the existing preparation does not match, pause before drilling. A qualified locksmith, door professional, integrator, or the door manufacturer can confirm whether modification is appropriate. For fire-rated or required-egress openings, verify the complete listed assembly and applicable requirements rather than relying on the lock's component rating alone.
Measurements to collect before choosing a lock
- Door material and type: wood, metal, fiberglass, glass-adjacent, residential, storefront, or another construction.
- Door thickness: measure the door itself, excluding decorative trim.
- Face preparation: number, diameter, and center-to-center spacing of round bores.
- Backset: distance from the door edge to the center of the main bore or spindle.
- Door edge: photograph the faceplate and measure its height, width, corner shape, screw positions, and hardware locations.
- Handing and swing: document which side the hinges are on and whether the door swings inward or outward.
- Clearance: record trim, glass, handles, weather seals, screens, and frame obstructions.
- Existing hardware: capture manufacturer names, model markings, lock-case labels, and door labels.
- Frame and strike: verify alignment and photograph the strike area.
Use the complete smart lock door compatibility checklist to organize these details.
Frequently asked questions
Can a double-bore smart lock replace a mortise lock?
Not as a routine direct replacement. The openings and internal hardware are fundamentally different. A professional must assess whether conversion is practical and appropriate for the exact door.
Is every multipoint door compatible with a mortise-style smart lock?
No. Multipoint systems are not standardized as one universal fit. Confirm the exact door and hardware system.
Can I drill a second bore to use the FP01?
Only after confirming all required dimensions, clearances, door construction, and any code, listing, or warranty implications. Professional installation is recommended when modifying a door.
Which Ora FacePass model should I choose?
Use the existing door architecture as the first filter, then compare features. See FP01 vs FP02 vs FP03 or request a review.
Request a compatibility review
Submit clear photos of both door faces, the door edge, the frame and strike, plus measurements through the Ora FacePass consultation form. Online checkout remains disabled so compatibility can be addressed before ecommerce launch.