Protect your trailer or caravan (RV) with the best coupler lock, AMPLOCK’s exclusive locks are the most durable and reliable on the market today. Our unique product is made with the following high quality materials : stainless steel, ducted cast iron 65000 and heat treated steel, to provide years of dependability and durability. The locks are made of good rust resistance insuring long term outdoor use in different climates. To increase security, each AMPLOCK lock has its own unique key and we use a disk-based lock coupled with a control and identification key system. You can enjoy life without worries with the best coupler lock. Our various models are mold to fit the specific shape of your trailer or caravan (RV) coupler when unhitched, so your AMPLOCK lock is the perfect theft deterrent. **Make sure you choose the right model for your trailer or caravan (RV) coupler size and type, referring to pictures provided (photos are for visual reference only) or to our website www.amplock.us **