Formed carbon steel outer housing: Provides robust protection against tampering and environmental exposure
Patented Cobra tubular keyway: Ensures high security and prevents key duplication
Dedicated chain locking compartment: Secures safety chains up to 3/8 inch for added trailer safety
Compatible with Demco cast raised trigger latch couplers: Offers seamless fit for popular trailer coupler systems
Upgradeable to 7-pin tubular lock: Allows for enhanced key control at no additional cost
Summarized by Shop
Description
Model 2178-D1 is designed to fit Demco Cast raised trigger latch couplers (as seen in the FINE PRINT section). This model was manufactured with a formed carbon steel outer housing to completely encapsulate the coupler head and latch. This lock model will be able to secure most safety chains up to 3/8" in the dedicated chain l
Outer Housing Material
Formed carbon steel
Key System
Cobra tubular keyway, standard included
Chain Compatibility
Secures safety chains up to 3/8 inch
Coupler Compatibility
Demco cast raised trigger latch couplers
Upgrade Options
Proven disc detainer lock, Medeco M3, Abloy cylinders available upon request
Summarized by Shop
4.9
104 ratings
5
4
3
2
1
Easy to use and solid
I found this to be very easy to install and uninstall on my teardrop. Very solid. This senior female had no problems with the weight of the model I ordered nor locking/unlocking.
E
Elaine · July 14, 2026
Not good
Pretty hard to rate your product when I was sent the wrong one. It's been a couple of weeks and still trying to get this straightened out.
R
Rodney · July 16, 2026
Excellent lock
Well built, goes on easily, feels really secure. If it works likes it looks and feels, this will be an excellent lock. Hope it is never challenged.