01
Unlock as you grip
The fingerprint sensor is built into the lever. Place an enrolled finger on the sensor as you grip to unlock and open the door.

D Series lever smart lock
Grip-to-open fingerprint unlocking on a lever handle with a mechanical mortise.
The D51 is a lever smart lock. It reads your fingerprint as you grip the handle, has a glass keypad, a switch that disables the inside handle, and remote unlock from the app. It keeps a conventional mechanical mortise, so you lock it by lifting the handle.
Unlocking
Finger · code · card · key · app
Design
Grip-to-open lever
Mortise
Mechanical
App
Wi-Fi remote unlock
Installed price
SGD 599.00
Includes GST and standard installation on a compatible door. Non-standard work is quoted after the door check.
Finish
Default
Format
Lever
Mortise
Mechanical mortise
Warranty
1-year local warranty
LeverA lever smart lock that reads your fingerprint as you grip the handle, on a mechanical mortise you already know.
In detail
01
The fingerprint sensor is built into the lever. Place an enrolled finger on the sensor as you grip to unlock and open the door.

02
A switch on the inside lever disables it, so nobody can reach in through the peephole or a grille and open the door from inside.

03
Fingerprint, keypad codes, a card, temporary codes for guests, the app and a mechanical key.

04
The D51 connects over Wi-Fi to the app, so you can unlock remotely, manage codes and see who came and went.




Fit and trade-offs
Suitable for
Anyone who prefers a lever handle, wants to keep a mechanical mortise, or has a tighter budget.
Not for
Buyers who want auto-locking — the D51's mechanical mortise is locked by lifting the handle.
01
The fingerprint sensor is built into the lever. Place an enrolled finger on the sensor as you grip to unlock and open the door.
02
A switch on the inside handle disables it, so nobody can reach in through the peephole or a grille and open the door from inside.
03
The D51 adds fingerprint, keypad and app unlocking while keeping a conventional mechanical mortise.
Specifications
The STANLEY D51 is a D Series lever smart lock with fingerprint unlocking in a grip-to-open handle, a tempered-glass touch keypad, a safe handle switch and Wi-Fi remote unlock from the app, on a mechanical mortise.
In the box
Care
Common questions
No. It uses a mechanical mortise. Lift the handle to lock it, as with a conventional lever lock.
The D51 connects over Wi-Fi to a Tuya-based app for remote unlock and code management.
A lever lock can suit main or interior doors, depending on the door material, thickness and cutout. Send us the door details and we will check.
Fit check
Share the door type, a photo and rough measurements. We check it fits before anyone drills a hole.