The Car-O-Liner Resistance Spot Welder, No. CTR7, works with all high-strength steels. The product design offers a low center of gravity for safe, easy handling. The aluminum telescopic support arm adjusts horizontally and vertically. The CTR7 features cutting-edge inverter technology, welding currents to 12,000 amps and transformer gun technology for a greater working range up to 20'. With software and a 7” color display, technicians can quickly set parameters for the job at hand.