This universal heavy duty hitch lock is perfect for coupling to any caravan or trailer, so you'll know that your vehicle is safe! It works with all 50mm tow balls which are standard for most of the caravans and trailers.
eBay
Anti-theft Trailer Hitch Lock Trailers Coupler Padlock Hook Connector Tongue Locks Hitch Security Protector Zinc Alloy 1/4 Inch
Aliexpress UK
Fits most 50mm Avonride cast heads from 1400Kg - 3500Kg including: 575003, 575004, 575005, 575008. Allows use of Avonride integral lock. The robust yellow steel casing with anti-saw features covers the fixing bolts of the hitch to protect it from being stolen.
eBay
Heavy Duty Trailer Hitch Lock - 2-5/16 inch Adjustable Anti-Theft Coupler Lock, Universal U-Shape Ball Security for Tow Receiver
Aliexpress UK
KEEP YOUR CARAVAN OR TRAILER SAFE AND SECURE WITH THIS HITCH LOCK VERY EASY TO APPLY AND USE VERY SECURE LOCK. Visible security that obstructs the tow hitch. Guardian hitch lock High visibility deterrent.
eBay
Trailer Hitch Pin Lock 5/8" 1/2" Dual Receiver Locking Trailer RV Truck Tow Heavy Duty Anti Theft for 2" Towing Receiver Lock
Aliexpress UK
Complete with hardened steel close shackle padlock and 2 keys. Heavy Duty Universal Trailer Hitch Lock. Suitable for horseboxes, car transports, trailers and trailer tents. Strong and robust case.
eBay
CNSPEED Trailer Hitch Coupler Lock 1/4" Zinc Alloy Small Trailer Lockstitch For Locking Hauling Security Towing Tow Bar
Aliexpress UK
Works with most types of coupling. 1 x Trailer Hook Lock. Color : Black. Size : 15.7 8 13cm. Weight : 800g.
eBay
Waterproof Caravan Hitch Cover PVC Trailer Tow Ball Coupling Lock Breathable Rain Snow Dustproof Protector Towing Hitch Cover
Aliexpress UK
In addition, it is not suitable for ordinary or modified hitches with stabilizers. The yellow color is eye-catching and easy to see. Easy to install manually and prevent theft. Easy to install: The trailer lock can be easily installed and removed without any tools, which is quick and convenient to use.
eBay
Password type trailer lock Key type trailer lock Stainless steel house anti-theft lock Flower basket type car lock Trailer hook
Aliexpress UK
Introducing the Trailock Towing Eye Lock, designed for a secure fit on your plant farm machinery trailer hitch with a 50mm pintle.
eBay
Caravan Hitch Cover Towing Hitch 600D Oxford Cloth Easy to Use Dustproof Rain Snow Protection RV Caravan Trailer Tow Hitch Cover
Aliexpress UK
Hitch & Coupling Heads. Trailer Parts. Trailer Security. Simply drop through then secure with padlock (Not Supplied). Padlock hole size = 15mm. Trailer Ring Eye Hitch Lock. Will fit up to a 30mm thick hitch with eyes 40mm and larger.
eBay
Caravan Hitch Cover Towing Hitch 600D Oxford Cloth Easy to Use Dustproof Rain Snow Protection RV Caravan Trailer Tow Hitch Cover
Aliexpress UK