Top positive review
NOT Wheel Chocks - These are Trailer Tire Stabilizers
Reviewed in the United States on July 2, 2018
The X-Chock works as advertised, but they CAN NOT be used as a replacement for wheel chocks. BAL includes a notice that using them while jacking the trailer or raising/lowering the tongue jack will VOID the warranty. These can only be used AFTER the trailer is leveled and MUST BE REMOVED before getting ready to hitch-up. So, you will still need wheel chocks to secure the trailer for other operations.
This was not made clear in the description. You only find it if you read through the Reviews or the Q & A answers (must expand to read all answers).
That said, these lock the trailer rock solid. My tires are closer together so I have to remove the X-Chocks one at a time to chock the tires to raise or lower the tongue jack. The tire pads are too low in my application.
Would buy again.