The Reese Towpower Universal Coupler Lock can give you peace of mind when it comes to storing trailers. It protects your unhitched trailers from being towed away by burglars. Use it for boat trailers camping trailers utility trailers and more. Because it s so easy to use this lock is an ideal solution whether you re storing your gear overnight or long term. The color makes it easy to spot encouraging thieves to stay away. The Reese Universal Coupler Lock works like a charm with 1-7/8 2 and 2-5/16 couplers. This along with multiple locking position options gives you the utmost versatility. You can use it easily with a wide range of couplers. It features a corrosion-resistant finish that withstands the vicissitudes of weather. Further heavy-duty cast steel construction bolsters the locking mechanism against picking and prying. Quick on/off enables you to access your trailers effortlessly. This Reese coupler lock comes with two keys.