Hi, I'm standing in front of a trailer today. I want to show you something that is very important about the trailer. It's not the most important, but it is very, very important. This hanging down below the trailer is called the Kingpin. It hooks to the tractor and allows you to be able to pull the trailer. Two things about the Kingpin is you can have a high hook where you're hooked. You're not even hooked to the tractor. The other one is you can be the trailer and nose of the trailer can be down. So low you can't even get to the Kingpin. It's important when you drop the trailer that you're even and you can just back up one of the trailer, lift the nose just a couple of inches off the ground. If you do that, it'll enable you to raise the feet or I call them landing gear off the ground a lot more easier.