Find the Right LNDU Smart Lock
Start with your door, then choose the way you want to come home. Check installation fit, explore five models, or ask our team for help.
Will it fit your door?
Measure door thickness, the existing bore hole, and backset (door edge to hole centre). Check opening direction and clearance around the handle and frame.
HK01W: door thickness 1⅜–2⅛ in; 2⅜ or 2¾ in backset. T225, D180 and WL01: door thickness 35–55 mm; 60 or 70 mm backset.
Hole sizes and hardware layout vary by model. Match your measurements to the selected model’s installation manual; do not assume every mortise, multipoint or unusual cutout is compatible.
DL500 mounts on the inside of a compatible existing lock. Check the cylinder or interior thumbturn shape, cylinder protrusion, and clearance around the lock.
Match the mounting bracket and adapter to your lock; an included adapter does not guarantee compatibility with every cylinder. Check whether the outside key can still operate with the retrofit installed.
Confirm fit with the DL500 installation manual before ordering. A European-style door alone does not establish compatibility.
Door thickness: measure across the door edge. Backset: measure from the door edge to the centre of the existing lock hole. Bore: measure the diameter of the main hole.
Photograph the outside lock, inside lock and door edge. For DL500, include a close-up of the interior cylinder or thumbturn. Keep house numbers, keys, access codes and other private details out of photos.
How would you like to unlock?
Choose a daily experience below. Features can overlap; each model highlights a different need. Check door fit and connection requirements before ordering.
HK01W · Tap to come home
Use your iPhone or Apple Watch as your house key. A compatible Apple device is required; Apple Home remote access has separate home hub requirements.
T225 · Touch, turn, enter
Unlock with your fingerprint and turn the handle in one easy motion. Connect its built-in Wi-Fi to your home network for remote app access.
DL500 · Keep your compatible lock
Add smart control on the inside while retaining compatible existing hardware. Uses the CLDBUS app via Bluetooth; confirm any remote-access gateway requirements before buying.
WL01 · Welcome guests remotely
Manage visitor access through the Tuya app when you are away. Remote functions require the lock to be connected to a working 2.4 GHz Wi-Fi network.
D180 · Simple everyday entry
Use a keypad code or physical key for daily access. Set up access directly on the lock; powered by four AA alkaline batteries.
Not sure which lock fits?
Tell us which model you are considering and your door measurements. Prepare photos of the inside, outside and edge of your door; hide house numbers, access codes and other personal details. Contact us to arrange how to share photos. Our guidance does not replace checking the model-specific installation dimensions.