Proven Industries Model 2178 Trailer Coupler Lock — 2-Inch (Blue-Square)

Reviews

1. K Kerry Arthur 5/5

   Heavy-duty and confidence-inspiring

   Sturdy construction and gives me confidence that the trailer is secured. Feels very durable and dependable.

2. M Mason 5/5

   Heavy steel, very reassuring

   The heavy steel construction gave me peace of mind when I left my camper unattended. Feels robust.

3. C Cisco Kid 5/5

   Needed a different variant for my flat coupler

   Customer support helped me swap the 2178 for the 2178U to work with my Magic Tilt flat coupler. The exchange was straightforward and the replacement fits my trailer well so far.

4. S Stephen J. Borcich 5/5

   Extremely solid on a dual-axle trailer

   Installed on a dual-axle trailer for a pontoon. It slid on easily, felt rock-steady once locked, and secured both the hitch and chain attachments. Very reassuring.

5. P Patrick S 5/5

   Saw the ads, decided to try it camping

   Bought one after seeing online ads and used it while camping. It hooked up easily when I detached the camper and provided reassurance that the trailer was secured.

6. A A. Andros 5/5

   Finally stopped worrying about theft

   I live where trailer theft is common and had no secure storage. This lock removed the anxiety — after months in use I feel the trailer is safe when parked in public. Worth the expenditure for my peace of mind.

7. R Richard 2/5

   Only fits select coupling styles — inspect your tongue

   If your coupler uses a particular collar or yoke style, this may not line up even if you have a 2" ball. The concept and weight are impressive, but a misaligned insert or set screw can prevent the pin from seating. Check your coupling type carefully before buying.

8. N nc surveyor 5/5

   Massive, well-engineered protection

   This unit is substantial and seats on my coupler without leaving vulnerable edges. It clamps the latch down so it cannot be lifted while installed. The chain keeper accepts oversized hooks with room to spare and the housing has bottom vents to drain water. The keyway appears designed to resist copying. A bit pricey but seems like a solid investment to protect an expensive trailer.

9. K Kevin Mighton 5/5

   Holds chains and secures the tongue well

   Performs reliably, holds the safety chains inside the head and provides a secure lock on the tongue.

10. T TMM 5/5

    Superb build but check fit carefully

    Welding, weight and finish were excellent on the unit I received. It’s a robust system and a real step up from cheaper options. My particular 2" hitch had an external yoke and the standard 2178 did not fit; support told me a different model exists for that application. Initial response was slow but chat support became helpful once contact was made.

11. A Allan A. 5/5

    Installation support and a robust unit

    After ordering, the company requested tongue photos to confirm the correct style, then shipped the right model a few days later. Easy to fit and take apart; heavy-duty build and a nonstandard key that should be hard to duplicate.

12. R Ray 5/5

    Reliable option for securing a travel trailer

    Used this to lock our travel trailer. It performed as expected and felt durable.

13. B ben Johnson 5/5

    Good quality — stow chains inside

    Solid locking hardware. I tuck my safety chains inside the housing and the whole assembly feels secure. I would recommend it.