Portable Electric Jacks The outstanding design and quality construction of WHITING Portable Electric Jacks provide years of dependable service with a minimum of maintenance. Features & Benefits Rugged construction: Welded to the base is a massive structural steel column assembly housing an ally steel jackscrew and aluminum bronze alloy jack nut. Electro-mechanical design: Whiting portable electric jacks consist of a steel base containing a worm and worm gear. The jack nut travels on the screw and supports the lifting bracket. Interlocking controls: A single operator manning a portable electric jack station can control the simultaneous operation of any number of jacks. Each jack may also be operated individually. Specialized Bracket Design: Jacks can be equipped with a variety of special lifting brackets.