Incorrect product description! I actually ordered the spacers twice thinking I got the wrong product on my first order, but both orders were the same product. I ordered spacers for my Grand Cherokee ZJ 5.9. There are two distinct issues with the product, the first is that it's not aluminum, it's some sort of rigid poly material. I prefer aluminum which is why I bought them. I would still try to use them, but I noticed another problem that I didn't like very much. The hole in the center of the spacer is significantly larger than the included hardware. I know that clamping pressure can hold the crossmember in place, but I don't like the idea that with so much play, the spacer can move back and forth more easily under torque from the engine/transmission to the crossmember.