BAL 28000A Tire Lock Chock<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Extend or retract both front and back chocks by turning the large center wing nut for a custom fit between tandem tires </span></li><li><span class="a-list-item"> Stabilizes both front and back tandem wheels </span></li><li><span class="a-list-item"> Zinc-plated steel resists rust </span></li><li><span class="a-list-item"> Diamond tread design provides a sure grip </span></li><li><span class="a-list-item"> Adjusts from 15 1/4" to 22 1/2"L. 4"H x 3 1/2"W </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41rs4tvMvkL.jpg" noproxy>