When you're fishing and hunting, being away from your trailer, camper or ATV for extended periods of time is sometimes unavoidable. So, don't leave your most valued investments unprotected. Get the world's toughest locks. TRIMAX locks push up on the wheel of your trailer, car, motorcycle, truck, boat, farm and construction equipment, ATV, and more. Once the lock is around the tire, slide the lock closed for security you can count on. This system also chocks the tire to keep if from moving. Fits most 8" to 15" trailer tires.