Can I Upgrade My Storefront Door to a Keyless Lock Without Replacing the Door?

Yes—many existing storefront doors can be upgraded to a mechanical keyless lock while keeping the door, but only when the new lock matches the installed hardware family, opening, and dimensions. First identify whether the door uses a narrow-stile deadlock, a push-paddle deadlatch, or an all-glass bottom-rail lock. Then compare the old lock body, bolt, backset, door thickness, cutout, strike, and key-override needs with the correct EASILOK series.

Start With the Lock You Have, Not the Lock You Want

“Can I make my storefront door keyless?” sounds like a feature question, but it is first a replacement question. The exterior keypad must operate the kind of lock body already prepared in the door. A narrow aluminum stile, a spring latch released by an inside paddle, and a lock mounted in the bottom rail of a Herculite glass door are three different structures. They cannot be converted into one another simply by choosing a similar-looking keypad.

Keeping the existing door is most realistic when the replacement follows the same hardware path. That means the body fits the existing cavity, the operating spindle or tailpiece reaches the correct point, the bolt or latch meets its receiver, and the trim covers the current preparation. If those conditions do not match, the project may require door modification, a different hardware family, or professional work.

Which of the Three Storefront Lock Systems Is on Your Door?

Use the lock location and the way people exit from inside to choose the first branch.

A work order may call the opening a storefront door lock, storefront lock, store lock, or commercial door lock, even though those descriptions can refer to any of the three rows. Glass door lock is equally broad because the glass may sit inside an aluminum frame or form an all-glass door. The physical location of the old lock is more useful than the wording on the paperwork.

Route 1: Replacing an MS1850S-Style Deadlock With a Keypad

If your aluminum-framed door has a deadlock in the vertical stile, the old Adams Rite lock or MS1850S lock may point toward the EASILOK 1850 family. Confirm the full marking and the physical lock before ordering; old paperwork that says Adams Rite deadbolt or MS1850S deadbolt does not establish the bolt, backset, or opening by itself.

For a compatible preparation, the keyless choices are:

• SK1850: a mechanical keypad deadlock without a key cylinder. It supports keyless locking and unlocking and is offered for straight-deadbolt or hookbolt configurations.
• SK1850S(sfic): a mechanical keypad deadlock with an SFIC key-override path. Choose this route only after confirming the required small-format interchangeable core and existing key system.

The SM1850 belongs to the same general MS1850S-style replacement path, but it is not an exterior keyless keypad upgrade. It uses Twist-to-Lock operation from inside without a key or code, while exterior entry uses a physical key in an SC keyway configuration. Choose it when that operating pattern is the goal—not when staff need code entry from outside.

Route 2: Upgrading a Door With an Inside Push Paddle

If the door closes on a spring-loaded latch and occupants press an inside paddle to exit, look at the deadlatch path rather than a storefront door deadbolt. An existing Adams Rite deadlatch or MS4510S lock may lead to this comparison, but the paddle, latch, backset, handing, strike, and door preparation still need to match.

• SK4510: a mechanical keypad storefront deadlatch without a key cylinder, supplied with a push-paddle operating path.
• SK4510S(sfic): a mechanical keypad deadlatch with SFIC key override and a non-handed push paddle; the latch can be configured for left- or right-handed doors.

Do not replace a push-paddle deadlatch with an 1850-style deadlock simply because both products fit narrow aluminum storefront doors. The latch action and inside release hardware are different. A dedicated push-paddle guide should be used to confirm this route before purchase.

Route 3: Upgrading a Herculite Glass Door at the Bottom Rail

An all-glass Herculite glass door may carry its locking hardware in the lower rail rather than the vertical door edge. If the old unit is a bottom rail lock associated with CRL 777S, FHC R777, or ILCO BRL, compare the physical rail, old body, threshold space, bolt position, and removal path with the 777 series.

• SK777: a mechanical keypad bottom-rail lock without a key cylinder.
• SK777S(sfic): a mechanical keypad bottom-rail lock with an SFIC key-override path.

The names CRL777, FHC777, and ILCO help identify what may have been installed, but they are not enough to confirm a replacement. Photograph the complete lower rail and floor receiver, not only the exterior face of the lock. Some installations require the door or rail to be handled by a glass-door professional.

What Must Match If You Want to Keep the Door?

Before treating the project as a no-new-drilling replacement, collect a physical record of the opening:

1. Photograph the full door from outside and inside.
2. Photograph the door edge or, for an all-glass door, the complete bottom rail.
3. Record the full old brand and model marking, including suffixes.
4. Identify a straight deadbolt, hookbolt, spring-loaded deadlatch, or bottom-rail bolt.
5. Measure the backset from the correct door-edge reference to the operating centerline.
6. Measure the prepared door member or rail using the current product guide’s reference points.
7. Record the faceplate, cutout, existing holes, strike or floor receiver, and any fillers or repairs.
8. Confirm door handing, alignment, and whether the door rubs, sags, or fails to close fully.
9. Decide whether exterior access should be code-only or should retain a key-override path.

EASILOK’s replacement approach can preserve an existing door when the old lock family, preparation, dimensions, and receiver align with the chosen configuration. “Without replacing the door” does not mean every storefront door accepts every keypad, and it does not automatically mean no new drilling. Matching hardware is what makes the simpler upgrade possible.

Should You Choose a Standard Keypad or an SFIC Version?

The standard models—SK1850, SK4510, and SK777—use mechanical code operation without a key cylinder. They suit an opening where authorized exterior entry can rely on the keypad and no master-key override is required.

The S models—SK1850S(sfic), SK4510S(sfic), and SK777S(sfic)—add an SFIC key-override path. That may be useful for a property manager, multi-site operator, or facility that already manages interchangeable cores. However, “SFIC” is a format, not a promise that any existing key will work. Confirm the core, keyway, pin configuration, and management plan before ordering.

If you need a physical key for ordinary exterior entry rather than a code, SM1850 is a separate operating choice for a compatible deadlock opening. It should not be described as the keyless exterior alternative to SK1850.

A Practical Buying Decision in Five Steps

1. Name the door structure: aluminum-framed storefront or all-glass Herculite-style door.
2. Identify the hardware family: narrow-stile deadlock, push-paddle deadlatch, or bottom-rail lock.
3. Record the opening: photos, old markings, bolt or latch, backset, thickness, cutout, holes, receiver, and handing.
4. Choose the access plan: mechanical code only, mechanical code plus SFIC key override, or—only for the compatible deadlock route—SM1850’s inside Twist-to-Lock with exterior keyed entry.
5. Compare one matching series: 1850, 4510, or 777. If any dimension or structure remains uncertain, ask a qualified commercial-door, locksmith, or glass-door professional to review the opening.

Frequently Asked Questions

Can I upgrade an existing storefront door to a keyless lock without replacing the door?

Yes, if the existing lock family, cutout, holes, backset, door or rail dimensions, bolt or latch, and receiver match the replacement configuration. First identify whether the opening uses a narrow-stile deadlock, a push-paddle deadlatch, or a bottom-rail lock. A matching EASILOK series may preserve the door; an unmatched opening may require modification or professional installation.

Which EASILOK keyless lock should I choose for a deadbolt, push-paddle, or bottom-rail door?

For a compatible MS1850S-style deadlock, compare SK1850 or SK1850S(sfic). For a compatible 4510-style deadlatch with an inside push paddle, compare SK4510 or SK4510S(sfic). For a compatible Herculite bottom-rail opening associated with CRL 777S, FHC R777, or ILCO BRL, compare SK777 or SK777S(sfic). Choose the S version only when an SFIC override is required and verified.

Related EASILOK Guides

• How to Identify a Storefront Door Lock
• How to Measure a Storefront Door Lock
• EASILOK SK1850 Compatibility Guide
• EASILOK SK4510 Compatibility Guide
• SK777 and SK777S Bottom-Rail Lock Guide

Keep the Door—After You Confirm the Opening

A keyless storefront upgrade should make access easier without turning hardware selection into guesswork. Match the new lock to the old hardware path, then choose code-only or verified SFIC override. If you need help identifying the opening, send EASILOK support full-door, lock, edge or rail, receiver, and measurement photos before ordering.