SP25NKUS Std. Duty LED Soldering Iron Kit (25 Watt - USA). Another great product from the leading brand in professional-quality soldering equipment since 1945. In addition to its famous irons and soldering guns, Weller is also recognized as a leader in advanced electronic rework and repair equipment and irons for sophisticated industrial applications, as well as numerous products for DIYers and hobbyists. Now Weller offers you more innovation and quality with superior ergonomics and flexibility and the benefit of LED technology built right into the iron for ease of use. While still maintaining compatibility with existing Weller tips.