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Trailer Locks & Hitch Pins by Trimax. Trimax Wheel Lock Features - The Trimax Wheel Lock secures your trailer, ATV, boat, car and truck. Fits almost all 10"-18" wheels.
User Review: It is not easy to protect a trailer from theft but this product does the job by protecting the lug nuts from removal and securing the wheel to unit. It is very solid and easy to install.[...]