Model S175

Great Lock, well built

I considered other options but this one fit my needs, it they can get through this one I'd be impressed, it isn't going to be easy.

Solid as can be

Very impressed with the quality of this lock. In this instance, you do get what you pay for.

Great Value

If I were to sum it up: the Model S175 is a strong, well-built coupler lock that gives you peace of mind—especially if you’re towing a boat, RV, or trailer in a high-theft area and want a lock that goes beyond the basic models. The “glove-like” fit and high-security key system elevate it above generic locks. For me it represents excellent value: you’re paying more than the cheapest locks, but you’re getting better materials, better security features, and a brand that emphasizes US manufacturing and precision.