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Lifestyle image of door lock and connectLifestyle image of door lock and connect
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Cut out image of  lock  on white backgroundCut out image of  lock  on white background

Bold Smart Door Lock with Connect - Lock Size: SX-33

Item #353031

Shipping Included
  • Lock size SX33 - suitable for doors up to 35mm inside, 45mm outside
  • - Unlock door with iOS/Android smartphone
  • - Lost/forgot phone? Gain entry with backup PIN
  • - Long battery life: 20,000 activations / 2 years approx- Set up users, access types, PIN and more with free Bold app


Please check your existing lock's measurements before purchasing or consult a professional locksmith.

Your estimated delivery time will be 3 business days (excluding weekends and bank holidays) from the time of order. Postcode Restrictions may apply. Find out more in the Delivery & Returns Tab below.


Enter and leave your home without having to worry about a key with the Bold Smart Lock. The Bold Smart Lock has a SKG three star rating which is the heaviest possible burglary resistance classification they give.

Now with the added Bold Connect this enables your Bold Smart Lock to be permanently connected through Wi-Fi to manage and control your locks from the app from anywhere. With a slim form factor, mounting options and a USB(C) interface for an external flexible power supply the Bold Connect can be easily installed anywhere, out of sight, or integrated into existing access control solutions. Easy set-up as available locks are automatically discovered.

Suitable for

The Bold Smart Lock fits all doors with a Euro profile cylinder and an internal dimension up to 35mm. The outside dimensions can be extended to 45mm by means of the supplied extensions. The distance from the centre of the cylinder to the inside of the door must not be less than 30mm.

The Bold Smart Lock is designed to replace a Euro profile cylinder, you simply remove the old cylinder from your door and install the Bold Smart Cylinder instead.

Battery life of 2 years

The Bold Smart Cylinder is easy to install without wiring. The internal battery lasts a minimum of 2 years even with intensive use of 25 activations per day. The battery status and usage are tracked and displayed in the app. You will receive a notification well in advance when the battery is due for replacement and can optionally be delivered via Bold direct delivery.

End-to-end encryption

All communication between the lock and the Bold servers is encrypted in the same way as the latest online banking software. The Bold Smart Lock is not vulnerable to eavesdropping on wireless signals, hacking the smartphone or other manipulation of communications.

Backup PIN

The Bold Smart Lock is completely keyless, even if you’ve forgotten your smartphone or if the locks battery runs out you can always open the door with the backup PIN code. You generate this code yourself in the bold-app and enter it by turning the outside knob.


  • Inner Size: 30-35mm
  • Outer size: 30, 35, 40, 45mm
  • Can replace Euro profile cylinders
  • Connect multiple locks to one Bold Connect
  • Battery: CR123A, 1550mAh
  • Battery Life: 2 years and/or 20,000 activations
  • Operating temperature inside knob: 10°C to 40°C
  • Operating temperature outside knob: -20°C to 80°C
  • IP rating outside knob: IP54
  • IP rating inside knob: IP4X
  • Certification: SKG 3 Star rating & EN15684
  • Communication: Wi-Fi (802.11 b/g/n)
  • Activation distance: 5M
  • Access control: Instant sharing and revocation of access
  • Types access schedule: Permanent, weekly, temporary push notification
  • Encryption: AES128 End-to-End
  • Works with iOS and Android


  • 1 x Bold Smart Door Lock 
  • 1 x Bold Connect
  • 1 x USB Power cable
  • 1 x Battery CR123A
  • 3 x Length adapters
  • 1 x Installation tool
  • 1 x Cylinder locking bolt
  • 1 x Mounting screw
  • 1 x Installation book

TypeSmart Door Lock
  •  Additional day(s) transit may be required for remote areas.
  •  Public and Regional holidays may affect delivery lead times.
  •  Delivery times may vary in the event of adverse weather conditions.
  •  Please note that we are unable to ship to the Channel Islands, Post Office boxes and BFPO.
  •  Further postcode delivery restrictions might apply to this item.
  •  We are committed to offering the best value to our members, with a satisfaction guarantee on both your membership and merchandise. If you have questions about your membership or products you've purchased at Costco, please contact our Customer Care team.
  •  If you wish to return an item, please view Costco's Return Policy.
  •   Costco Concierge Services | Technical Support
    Free technical support exclusive to Costco members for select electronics and consumer goods.
  •  Items purchased online can be returned at any of our UK warehouses if you are a warehouse member.
  •  Many of our small items can be returned via “My account” on the website and printing a return label. This label must be attached to the box being returned.
  •  Please securely pack the items you intend to return in a box. If you are using the original packaging, be sure to remove the delivery label.
  •  If you need to return a larger item, please contact our Member Care team via the chat function on our website or call 0800 0324 324.
  •  Find out more about our Delivery, Cancellations and Assistance Policy
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