The Weller WMRPMS (T0052919299) Micro Soldering Iron (55W Max, 12V) is MIL-Spec approved and ideal for soldering under a microscope. The WMRP-MS features excellent reaction time with fine tips and provides the fastest heat up and recovery on the market. The cartridge style tip can be easily and quickly changed without any tools required. Weighing only 2.65 oz (75 g), the WMRPMS is made from aluminum with chrome plating. The micro soldering iron is compatible with WD1M / WD2M series soldering stations and WR3M / WR3ME series rework stations. When placed in the WSR 205 safety rest (sold separately), the WMRPMS will power down, helping to extend tip life.