Bulldog AI20 Air Line Lock
  • Bulldog AI20 Air Line Lock
  • Bulldog AI20 Air Line Lock
  • Bulldog AI20 Air Line Lock

Bulldog AI20 Air Line Lock

Tax included

Bulldog AI20 is a highly portable and secure air line lock that secures commercial trailers by preventing the release of the brakes. Provides Health & Safety benefits by preventing unauthorised movement of trailers when loading/unloading. 

For your total peace of mind, the Bulldog AI20 is eligible for our Product and Key Registration Service which can be selected below.

Product and Key Registration Service: No thanks, I'll keep my key details safe and register my product


Payments secured by bank grade encryption


Fully tracked delivery via UPS


Support available 8am - 10pm 365 days a year


  • Simply lock on to the Emergency C Coupling of the trailer to prevent unauthorised movement.

At a Glance

  • Heavy duty and fully portable
  • Drill and pick resistant heavy duty lock
  • Simple to fit - prevents release of brakes
  • Helps prevent theft of trailer
  • No padlock, utilises Bulldog’s unique Lock Bolt, with drill and pick resistant lock with 10 radial pins.
  • Zinc plated

For your Peace of Mind


Data sheet

Eligible for Product and Key Registration Service
Lock Type
Plunge Bolt
Multiple locks operated by same key (keyed alike)
Yes (small surcharge)
Locks manufactured to an existing key number
Yes (small surcharge)

Specific References


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