Advance Tech Service [P] Ltd. Manufactures High Watt Soldering Iron. Advance Tech Service [P] Ltd. Received EFY Award in Soldering Desoldering category. The heater of the High Watt Soldering Iron is deigned for high efficiency to deliver heat on very heavy points and better efficiency. Used for heavy heat job, this Advance Tech Service [P] Ltd. Offered product is a high wattage series of 100,150 and 300 Watt iron.