Bulldog AB ALKO / Knott Hitch Lock – heavy-duty trailer and caravan security designed specifically for ALKO AK301 and AK351 couplings.
 
Manufactured in Great Britain from 4mm heavy-duty steel, the Bulldog AB completely encloses the hitch head and its fixings to help protect against tampering and unauthorised towing. Ball socket retention and a drill and pick-resistant high-security locking system provide additional protection around the coupling.
 
Product Highlights
• Designed for ALKO AK301 couplings
• Designed for ALKO AK351 couplings
• Suitable for trailers & caravans
• Heavy-duty 4mm steel construction
• Encloses the hitch head & fixings
• Ball socket retention
• Drill and pick-resistant security lock
• 5-year Bulldog guarantee when registered
 
Heavy-Duty Hitch Security
The Bulldog AB ALKO / Knott Hitch Lock is manufactured from 4mm heavy-duty steel, creating a substantial physical barrier around the trailer or caravan coupling.
 
When fitted, the lock encloses the hitch head and its fixings, restricting access to important components and helping make tampering, forced removal and unauthorised towing more difficult.
 
Ball Socket Retention
The Bulldog AB incorporates ball socket retention, providing an additional physical layer of security around the towing point.
Combined with the enclosed hitch design and heavy-duty steel construction, this provides robust protection for compatible ALKO AK301 and AK351 couplings.
 
High-Security Lock
A drill and pick-resistant high-security locking system provides additional protection against common methods of attack.
The bright red powder-coated finish also makes the Bulldog AB clearly visible when fitted, creating a strong visual deterrent.
 
Compact & Easy to Fit
Despite its heavy-duty construction, the Bulldog AB is designed to be quick and straightforward to fit.
Its compact size also makes it convenient to remove and store alongside your other towing equipment when not required.
 
Hitch Compatibility
The Bulldog AB is designed for:
• ALKO AK301 couplings
• ALKO AK351 couplings
• Compatible trailer hitch heads
• Compatible caravan hitch heads
Important: Always check the manufacturer and model of your coupling before ordering to ensure the Bulldog AB is compatible with your trailer or caravan.
 
Key Security Features
• Heavy-duty 4mm steel construction
• Encloses the hitch head and fixings
• Ball socket retention
• Drill and pick-resistant locking system
• Highly visible red powder-coated finish
• Compact and straightforward to fit
• Sold Secure approved
• Secured by Design recognised
• Insurance approved
• Made in Great Britain
• Bulldog Security Key Registration eligible
 
What’s Included?
• 1 × Bulldog AB ALKO / Knott Hitch Lock
• 2 × security keys
 
5-Year Guarantee
The Bulldog AB ALKO / Knott Hitch Lock is backed by a 5-year manufacturer’s guarantee when registered, providing additional reassurance for long-term trailer and caravan security.
 
Keyed-Alike Option
Have your Bulldog AB keyed alike to a compatible existing Bulldog security product for an additional £2.49.
Email your existing Bulldog key code to info@driveawaylocksmith.co.uk after ordering so compatibility can be confirmed.