Sew2bhappy, yes that's exactly what I have.
They work good on tandem axles with tires close to each other, not very well on those with close to a foot in between.
I use a ratcheting box wrench to tighten them really good. They stop most of the fore-aft movement. If your tires are under inflated, it does not work well, but worse than that you risk a tire failure on the highway, so the tires should always be properly inflated anyway.