The new TD-100A Ergonomic Soldering Iron replaces the TD-100 Soldering Iron handpiece as standard in the MBT 301 and MBT 350 Solder, Desolder and Rework Stations. The TD-100A maintains the comfort and feel of the original handpiece yet contains many enhancements. Slim and lightweight, the handpiece dramatically reduces grip stress and operator fatigue, enhancing productivity. The TD-100A works with all current Black (part numbers beginning with 70-1124- and 70-1126-) and Gold Series (part numbers beginning with 70-1128-) Tip-Heater Cartridges. The silver colored TD-100A is available as an optional replacement handpiece for all other IntelliHeat-controlled Soldering Stations, including the ST 30, ST 50, ST 70, ST 100 and WJS 100.