I never really thought about putting a lock on our fifth wheel until this year when I started seeing a lot of stories about stolen RV's. How long have you been locking your king pin?
I always lock the pin on my 5th wheel. It only takes a minute and gives me a little more secure feeling with all the nuts out there now. If they try and cut off this lock they will have to cut part of the pin so they can't tow in anyway. Curly