If your chains are so long that they drag or are close to the ground they are too long to use, if the tongue comes loose it will dig into the asphalt and flip the trailer or the tow vehicle, use safety chains that have about 3" of sag so they will cradle the tongue like they are supposed to do.
How is this product even certified! Chains that are too long and dragging would be extremely dangerous and tethering them up in the "chain up " or twist ties or rope or any other way is extremely dangerous. if the trailer were to disconnect it simply would tear such adjustments apart and the tongue of the trailer would end up in the asphalt or !! ...chains are supposed to be just the right length and criss crossed in order to support the tongue OFF the ground in the event of a disconnect !
We agree the Chain-up would not hold (and is not intended to hold) the trailer in the event of detachment. The great benefit of the Chain-up is to help prevent the chains from touching the ground when the trailer is properly connected and driving down the road. There are moments while driving when bumps or driveways can cause even correctly sized chains to touch the ground. Even these quick moments of contact can eventually wear and weaken the chain and create dangerous sparks. The Chain-up is a safety device for driving with the trailer connected. In the event of detachment, the Chain-up will not interfere with the function of the safety chains - to prevent complete separation of the trailer from the tow vehicle.
My hitch ball has grease on it to reduce friction and wear. Pulling the plastic on and off the ball every time will get a bit messy. Easier to adjust the chains to the proper length.
+SAVOIECLAN, thanks for the comment. Having the safety chains the correct length to allow for turns but not drag when towing straight is idea, you are correct. However, sometimes this is not possible, or is an expensive modification to a trailer's tongue. The Chain Up is a simple and inexpensive solution until you are able to have the ideal.