WELLER 51512499 Wdc Soldering Tip Dry Cleaning System with Replaceable Wool • Gentle Tip Cleaning When Using Lead Free Solder To Extend Tip Life • Will Not Thermally Shock Tip Because Tip Temperature Remains Constant • Prolongs The Wetability Of The Tip When Using Water Soluble Flux • Collector Box With Soft Edge For Tapping Off Excess Solder • Special Metal Wool Is Used For Removing Oxidation Layers On The Tip • Esd Safe