Home made wheel chocks for spread axles???

I made mine using 4x4 wood material. Each is abt 8 inches long and one end is cut on a 45 degree angle, they are attached to each other by a short peice of nylon string. The pair is placed on the ground between the tires and gently snugged against the tire. THE WIFE does this. We have used for 3 years plus doing a lot, for us, traveling over 40 states, including Alaska and 35,000 miles.
Works like gang busters and CHEAP.
CCC