Sunex 6603 3-Ton, Service Jack Overload and bypass safety valves prevent the jack from being used beyond its rated capacity and prevent ram over extension High carbon steel side plates for increased chassis strength Wide front wheels and ball bearing mounted rear caster wheels for stability and easy maneuverability Two piece handle with knurled hand grip provides non-slip ease of pumping and longer reach under the vehicle Wiper seals protect hydraulic system from contaminants