Top Line Manufacturing CAMTO31L Cam-Type Trailer Tongue Coupler Lock

The Top Line Manufacturing CAMTO31L is a cam-type trailer tongue lock designed to secure ball-style trailer couplers and prevent unauthorized towing. Built for reliability and ease of use, this coupler lock features a hardened steel body and a cam locking mechanism that clamps tightly over the coupler head, creating a strong deterrent against theft.

Key Features:

• Cam-type locking mechanism for a secure, rattle-free fit
• Hardened steel construction for cut and pry resistance
• Designed to fit standard ball-style trailer couplers
• Weather-resistant finish to withstand outdoor exposure
• Easy one-hand operation — no tools required for installation or removal
• Includes keys for secure locking

The CAMTO31L is an effective trailer security solution for boat trailers, utility trailers, campers, and more. Its cam-action design ensures a firm grip on the coupler, reducing movement and vibration when locked in place.