Be prepared for a trip to a home improvement store.  Get shorter lag bolts or you risk putting them through your trailer's outer wall.  We also needed shorter screws for the back of the television so try everything first.  Even with the two #12 1" lag screws I used and a small, light TV I wish they would have made a triangle bracket option instead - three beats two.  It is secure to the wall, but I worry about any potholes bringing it down.  Great start for the price point, but lacking.  

Also, I would have kept this to myself but they sent me 6 emails insisting I post review, so here you go.  Unsubscribe when you get the first because they don't stop.