Lock it or lose it

Sold Secure tested · Secured by Design accredited

The lock you never take off

Every other hitch lock has to come off before you can tow. So it ends up in the shed, and your trailer sits unprotected. Kantrob stays on. Fit it once and it’s on the trailer when the thief arrives.

Talk to us See how it fits

Every other lock
Kantrob
Remove it to tow
Stays on while towing
Protected when you remember
Protected always
Lives in the shed
Lives on the hitch

Independently tested and rated

Sold Secure — tested to reduce crime
Secured by Design — Official Police Security Initiative
UK shield mark reading Patent Pending

Certificate details are available on request.

Trailers are the most stolen item on the farm

A trailer takes under a minute to hitch and drive away. The only thing that stops it is a lock that’s actually fitted.

MOST STOLEN

Trailers are the most commonly stolen item of farm machinery.

An Garda Síochána

£2.2M

The cost of rural crime in Northern Ireland in 2025, up almost a quarter in a year.

NFU Mutual

< 1 MIN

Long enough to hitch an unsecured trailer and drive it off the yard.

Time to steal

Kantrob hitch lock fitted to a Knott coupling on a trailer, keys in the barrel

The product

KNOTTLOCK

Cast stainless steel, 2.5 kg, and engineered to stay fitted while you tow.

  • Cast stainless steel
  • 2.5 kg
  • Fits all Knott couplings

See the full specification

How it works

A Knott 50 trailer coupling with its handle raised, shown on its own without a lock fitted
A Knott coupling on its own, before the lock goes on.

  1. Feed the base through

    The base of the lock passes through the opening in the coupling, so it locks through the hitch rather than clamping around it.

  2. Slide it on

    The body slides on from the other side and closes over the coupling. No tools, and it’s on in under 10 seconds.

  3. Turn the key

    Independently tested by Sold Secure and verified as drill and pick resistant.

  4. Hitch up and go

    It stays on while towing. Nothing to remove, nothing to store.

  5. Leave it on

    Parked in the yard, at the mart or on site, it’s already locked.

Which lock fits my hitch?

It fits every Knott coupling — KF, KFG, KRV and KS. Check the code stamped into your casting.

Who it’s for

  • Farmers

    Trailers, stock boxes and machinery standing in open yards.

  • Contractors

    Plant and tipping trailers left on site between jobs.

  • Fleet operators

    Trailers across multiple sites and drivers. Distributor enquiries

Why KNOTTLOCK is different

  • Fits in less than 10 seconds
  • Simple and easy to use
  • No troublesome three- or four-part assembly
  • Put it on in the morning and leave it on
  • Stays on while towing
  • Stays on while hitched
  • Stays on while unhitched
  • Stays on 24/7