Black X smart lock in Matte Black, showing the smart module and euro cylinder
Black X smart lock: 5 ways to unlock – app, PIN keypad, key fob, RFID card and mechanical override key
Woman and girl unlocking the front door by phone with the Black X smart lock – 2 override keys included
Chrome Black X smart lock fitted below a chrome lever handle on the inside of a dark grey door
Outside of a grey front door with the Black X smart lock below a chrome handle and a PIN keypad fitted to the frame
Black X smart lock security: TS007 3-Star Kitemark, Secured by Design and IASME IoT Cyber Assurance Level Two
How to fit the Black X smart lock: remove the old euro cylinder, fit the Black X, connect the app. No drilling or wiring
Black X smart lock remote access: phone on a beach shows a guest has unlocked the door, beside a white smart hub
Black X smart lock in Matte White, showing the smart module and euro cylinder
Black X smart lock in Polished Brass, showing the smart module and euro cylinder
Black X smart lock in Satin Nickel, showing the smart module and euro cylinder
Black X smart lock in Chrome, showing the smart module and euro cylinder
Black X smart lock module with the battery cover open and a CR2 battery being fitted
Black X branded 3V CR2 battery, included with the Black X smart lock
Black X smart lock in Matte Black, showing the smart module and euro cylinder
Black X smart lock: 5 ways to unlock – app, PIN keypad, key fob, RFID card and mechanical override key
Woman and girl unlocking the front door by phone with the Black X smart lock – 2 override keys included
ABS Black X euro cylinder security lock product video
Chrome Black X smart lock fitted below a chrome lever handle on the inside of a dark grey door
Outside of a grey front door with the Black X smart lock below a chrome handle and a PIN keypad fitted to the frame
Black X smart lock security: TS007 3-Star Kitemark, Secured by Design and IASME IoT Cyber Assurance Level Two
How to fit the Black X smart lock: remove the old euro cylinder, fit the Black X, connect the app. No drilling or wiring
Black X smart lock remote access: phone on a beach shows a guest has unlocked the door, beside a white smart hub
Black X smart lock in Matte White, showing the smart module and euro cylinder
Black X smart lock in Polished Brass, showing the smart module and euro cylinder
Black X smart lock in Satin Nickel, showing the smart module and euro cylinder
Black X smart lock in Chrome, showing the smart module and euro cylinder
Black X smart lock module with the battery cover open and a CR2 battery being fitted
Black X branded 3V CR2 battery, included with the Black X smart lock
Avocet ABS

Black X Smart Lock – Keyless Euro Cylinder with App, PIN & RFID AccessBlack X Smart Lock

5.0 (17 reviews)
£249.99 £199.99 Sale SKU: HS2811
Colour: Matte Black
Size (INT) - (EXT)
£249.99 £199.99
Colour: Matte Black
Size (INT) - (EXT)
Order by 2pm for same-day dispatch
Eye visibility icon in black, representing monitoring, visibility, or visual deterrence, displayed on a transparent background.

Same-day dispatch on orders before 2pm

Fully tracked 2 working-day courier

Will it fit?
  • Sizes: 35/35mm or 40/40mm only, measured from the centre fixing screw to each end.
  • Need a different size? Call us on 0151 521 8089 before you order.
  • Fits uPVC and composite doors that use a euro cylinder. A straight swap: no drilling or wiring.
  • Not sure of your size? How to measure your euro cylinder.
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Frequently Asked Questions

It’s a smart euro cylinder lock that lets you unlock your door using a smartphone app, PIN code, key fob, RFID card, or a traditional key.

It fits uPVC and composite doors that use a euro profile cylinder. Measure your existing cylinder and choose 35mm–35mm or 40mm–40mm before ordering.

No. It replaces your existing cylinder with no drilling or wiring required — a simple DIY installation.

It uses a CR2 battery that can last up to 3 years depending on usage.

Yes. You can add a keypad, RFID accessories, and connect a WiFi Bridge for remote access and smart home integration. Read Why the Avocet Black X Smart Lock Is Worth It
Black X smart lock fitted to a front door with TS007 3 Star, SS312 Diamond and Secured by Design security certifications.
Black X keyless smart lock showing five ways to unlock a door: smartphone app, PIN keypad, key fob, RFID card and mechanical key.
Black X smart lock installation showing how an existing Euro cylinder is removed and replaced without new holes, wiring or door modifications.
Black X smart lock app showing temporary and permanent door access for family, cleaners and guests, with access that can be revoked anytime.
Black X smart lock battery features showing up to three years battery life, low-battery alerts and mechanical key backup.
Black X smart lock in matte black, matte white, polished brass, satin nickel and chrome, with 35/35 and 40/40 Euro cylinder sizing guide.
Product overview

The Black X by Avocet ABS is a smart euro cylinder: it replaces the cylinder in your door so you can unlock with your phone, a PIN, a fob or a card, with a key as backup. It's TS007 3 Star Kitemarked, so it keeps the highest anti-snap rating for euro cylinders.

Security

  • TS007 3 Star Kitemark, anti-snap. If attacked, the cam locks and the door stays secure.
  • Sold Secure SS312 Diamond and Secured by Design
  • IASME IoT Cyber Assurance Level Two

Five ways to unlock

  • The free Black X app on your phone
  • PIN, with the xPad keypad (sold separately)
  • Key fob (sold separately)
  • RFID card (sold separately)
  • Mechanical key: 2 override keys included

From the app you can give family, guests or cleaners temporary or permanent access, and take it away again. Add the Wi-Fi Bridge for remote control, entry alerts and Alexa or Google voice control.

Sizes, finishes and fitting

  • Sizes: 35/35mm or 40/40mm only. Need a different size? Call us on 0151 521 8089 before you order.
  • Finishes: Matte Black, Matte White, Polished Brass, Satin Nickel and Chrome
  • Fitting: a straight swap for your euro cylinder on uPVC and composite doors. No drilling or wiring. Watch the fitting video below.
  • Battery: up to 3 years on one CR2 battery (included), with low-battery alerts in the app. The key still works if it runs flat.

In the box: Black X smart lock cylinder, CR2 battery, 2 override keys, fixing screw and fitting instructions.
Delivery & Returns

How much is delivery?

UK Mainland Delivery is £2.99 on all items no matter how many you order!

Northern Ireland, Scottish Highlands, Channel Islands £6.00.

We do not offer International Delivery (Ireland, France, Spain etc).

When will my order be dispatched?

Orders before 2pm (Monday to Friday) are usually dispatched same day but may take up to 24 hours.

When will I receive my item?

We ship on 2 working day courier. Fully Tracked. Tracking will be emailed on dispatch.

Special order items such as keyed alike locks will take longer to dispatch. Please refer to product description for lead times.

I haven't received my item?

Please email us your name, order number and date of purchase.

We prefer email as it allows us time to research and respond.

Returns Information

We operate a 30 day refunds and return policy.

If you change your mind you must return the product back to us within 30 days of delivery

Please include a copy of your invoice and a note stating reason for return.

Additional keys, locks keyed alike or built to code are non refundable as they are personalised made to order goods.

Any refund, which is due to a fault or other defect, will include a refund of the applicable delivery charges otherwise not.

It is the buyers responsibility to arrange the return of goods to us. We do not offer a collection service for returning items.

Items must be returned including original product packaging and accessories.

We reserve the right to refuse any returns that do not comply with this policy.

Please post returns to the following address:

Home Secure (Online)

Unit 5, Brookfield Drive

Liverpool, L9 7AJ

United Kingdom