Designed to provide dependable service on busy production lines, in factory technical departments, in the shops of skilled artisans and in the hands of serious hobbyists. These irons are built around the ESICO Ni-Chrome Compression wound, mica insulated element. This tool is engineered for quick heat production, transfer and thermal recovery. The stainless steel stem assures cooler handles. Tips are precision machined from tellurium copper to assure maximum rapid heat transfer and electro-plated iron and nickel-chrome for the longest tip life, protecting it from thermal oxidation, flux and the aggressive nature of tin found in many solder alloys.