NFPA Wheel Chock Individual 8"H X 8.5"W X 12"L (height dimensions include cleat) Heel-to-toe length allows for a steeper line of force between axle and rear teeth, and therefore an enhanced coefficient of friction. Hand-grab opening allows for fast placement and retrieval. Flanged base allows a full range of bracket options. Easily manage the many conditions fire apparatus are likely to encounter including hazardous road conditions, heavy vehicle weights, large tire sizes, solid bottom and...