Safe welder [f] Shop portability is key to Lincoln's new Weld-Pak 155 unit. It uses a voltage input of 230v to handle thicker material. It welds both MIG and flux core on many different metals. A special cold electrode keeps you from danger of flash because it doesn't heat the unit until you strike an arc. Suggested price: $645. Contact Lincoln Electric Co., Dept. FIN, 22801 St. Claire Ave., Cleveland, OH 44117, 216/481-8100.