Fast, safe, easy way to change a flat without having to unload. No other jack is needed - ride the good tire onto the jack and change your tire. Made of high-strength polymer with a maximum trailer capacity of 6 tons. Traction treads on front ramp and 3 rows of bottom teeth provide sure gripping. Front holes and rear slots allow for easy handling. Can also be used as a wedge chock when trailer is parked. Black with rounded corners. 6" x 24"