I recently got a new enclosed trailer and it has a 2 5/16 coupler on it, I tried the yellow Reese inverted " U " shaped lock and it was not wide enough for the sides of the coupler, even though it says it will fit 2 5/16 
also the lift latch is about an INCH wide and my normal boat trailer coupler lock will not make it all the way through the hole
need some ideas , my trailer is unprotected
thanks
also the lift latch is about an INCH wide and my normal boat trailer coupler lock will not make it all the way through the hole
need some ideas , my trailer is unprotected
thanks