About Madlock

Madlock is a patent pending trailer coupler lock which fits most stamped steel, ball type trailer couplers for RV travel, race car, snowmobile, ATV, cargo & countless other applications. This innovative one piece design is very easy to use and our house color orange is a great visual deterrent at a glance by potential thieves.

Madlock is one of the toughest locks on the market today. This lock gives security to trailer owners & frustration to thieves. Your insurance provider will be pleased to know you have "Madlock trailer security". Also availible in "Keyed Alike"

The ultimate security in the palm of your hand.


"Madlock is the easiest trailer lock to use. Alternative locks tend to take effort to install, but with Madlock, it can be done one handed!"

Nicole Giesbrecht - Fernie, BC