Home made wheel chocks

I've been using scraps of lumber for wheel chocks on my tear, so I decided to make some better ones. They're pretty simple. Each one is made of three pieces of 2x4 cut on an angle and glued together. A 6" carriage bolt runs through them and attaches to a 1/2" plywood tie bar. A 1 1/2" long slot on one end of the bar lets you slide them apart, and slip them around the wheels. then push them tight against the wheel and tighten the wing nut. Here are some pics.
I think they'll work!
Sam
I think they'll work!
Sam