If you are concerned about the security of your boat latch at the ramp, then this is the item for you. Secure your latch on your trailer by simply adding a lock to the lock nut side of the bolt. This will help deter someone from stealing your boat latch at the ramp or at home. For greater peace of mind, you can install 2 locks instead of one. Discounted price on 2. You can install one on the bolt end and one on the nut end to prevent any access to either the bolt or the nut.